I did a lot of research before going. I contacted a number of kayaking instructors that I know from the National Outdoor Leadership School to see what NOLS does regarding bears and sea kayaking and it took me a while to figure out that NOLS isn't too worried about it because they tend to stay away from the prime Brown bear habitats.
All of our food was in plastic bags, then inside dry bags (bear canisters don't work in kayaks). But the problem was that there was so much of it. 80 pounds or so for the two of us. When Sarah and I talked about this we realized that hanging 80 pounds of food would be incredibly difficult (we later realized that the trees along the coast weren't suitable for hanging). We decided to do what NOLS does, which is leave the food inside the kayaks. This would keep little critters away, and we would just have to remain aware in case of larger critters.
Both of us carried bear spray, and we were both pretty careful about odoriferous items in the tent. Oddly, One evening while looking at our cans of bear spray I realized that my 'American' bear spray was 2% capsaicin. While her 'Canadian' spray was only 1%.
We saw the occasional bear print. We actually camped one night about ten feet from Bear scat - though it was fairly old. We saw three bears walking the coast while we were paddling. Two black bears and one Brown. We were never really concerned.
Until that night.
We had come ashore at around 4 on an amazing sunny day. We had taken the opportunity to lay some clothes out to dry. Sarah cooked an amazing dinner. The kayaks were about 10 feet from a large rock outcropping. Tied to a tree in case of a storm surge wave. The tent was at the same height vertically up the beach, but about 30 feet away. The door of the tent was facing the water. It was 8:24 when I heard something moving through the forest behind our tent. It was the sounds of branches snapping. It was still completely light out. I poked my head outside the tent but didn't see anything. The sounds came and went for a couple of minutes. Sarah was just dozing off next to me, and I was reading. I heard another sound of something moving through the woods, unzipped the back door, poked my head out, and was looking directly into the eyes of a very large - and really quite beautiful - Brown bear. I got back int he tent, Sarah woke, I am sure sensing the change in energy in our small space, and said "what?" To which I calmly replied that there was a brown bear standing on my kayak.
My kayak was closest to the tent. They were separated by about two feet. Sarah's cockpit cover was off. The bears rear legs were on the ground. His front paws were on my kayak. With his right paw resting on the hatch cover. He was big. probably 1400 pounds. With his front paws on my kayak, and his head erect - looking at me! - his head was probably 8 feet off the ground. He was not being threatening in any way. He just looked curious.
I got out of the back door of the tent, Sarah got out the front door. We both held our bear sprays with the safety caps still on. We began yelling for him to go away. We yelled for about 30 seconds and he just stared at us. Then I realized I was standing on a rock covered beach. I picked one up, about softball sized, and threw it at him. I have no throwing arm and missed, but he started walking away. He walked towards the rock outcropping with us still yelling. I threw another, and he moved another couple of feet. A moment later I threw a third and he very gracefully climbed the rocks and walked into the woods.
I can only explain the expression on the bears face as similar to my dog when I tell her to leave the kitchen - "what? what did I do? Okay, Ill go."
Sarah looked at me and said "I think we should go" and we did. We were on the water 30 minutes later.
The bear was standing on the hatch with all of my food in it, but he had walked over Sarah's kayak - stepping in the cockpit and popping her cover - which also contained food. As we were paddling across the water to another beach - and we saw him several beaches further north - I realized what I think drew him in. We were one day from Juneau. One day from completing the longest uninterrupted section of the entire paddle. Which meant we had a lot of garbage - food garbage, and food packaging. It was all in plastic bags inside a dry bag, but it was in the compartment he was standing on. I think if we had given him another 30 seconds he would have located it and tried to get it.
We dumped our garbage the next day in Juneau, and were much more stressed over bears the remainder of the trip. We could have dumped food garbage during crossings in the water. Though this is against LNT it is biodegradable and wouldn't have caused too much harm. If it had been two days to Juneau I might have done that. But we still would have had other garbage on board. There really isn't much we could have done differently. As encounters with large brown bears go, this was a fairly good one.
*The Coastal Brown bear has a close relative the Grizzly bear, and is commonly mis-identified as such. Grizzly bears however live inland whereas the Brown bear lives at the coast. Browns are larger than Grizzlies and somewhat more aggressive. A close relative to the Brown, is the Kodiak bear which is larger still, and only second - size wise - to the Polar bear.