Without the mention of camping or flat water, I had to assume you wanted this siamese twin to actually move. I could not produce any good visions of that! I keep thinking of other efforts to hook up 2 AI's that ended badly.
But for sheltered camping, there are lots of ways to go. You could easily tie your Amas together or interlock them. With AI's, if you don't float all 4 Amas, there may not be enough stability. But 2 TI's could really make a nice party boat. (Hmmmn,..)
From there, a combo of Haka benches and tramps would give you room to stretch out, sleep and move around. A large inflatable raft between the boats might even be better.
The only concerns I see would be any rocking transferred from boat to boat (catapult) and what to do when it's time for #2.
Actually, one more thing might worry me. Can bears swim?
Thanks for your response.
I've seen the brilliant stuff you've done to your boat; Well Done!
On the 'Coast' here, there are some amazingly sheltered places, but just when you thought your butt was safe, some 140 footer plows his way up to Desolation Sound and would prolly yank the fittings out of the hulls due to the bow wave spill over even in the most protected places.
For the 'raft' I use a Sevylor Inflatable Paddleboard. It's not the best but it makes a great mattress if the pressure is reduced down to 5 or 6 lbs.
Thanks for your suggestions on alternative camping methods. I'll give them a close look.
As for the Bears' swimming ability, yup they can. However in Southern BC we only get Black Bears which are low on the ferocity scale. (The Browns live up north, and they are way dangerous when the sows have cubs in tow). Either way, I carry a Very Pistol. In the last 40 years, I've only had to shoot one Black (much to my regret...).