Ah, this is great having some discussion on kayaks since obviously there are advantages to getting silently on the water.
I bought an inflatable kayak (such a beasts may not even qualify to take the name, I guess) and took it to Haida Gwaii in 2015 but never used it. I had bought one of those good off-road compressors and rigged a tank up under one of the motorhome benches for easy inflation etc. Tried it out on a local lake and obviously it's not as easy to handle relative to paddling and fighting wind but it seemed like on a calm day I could trust having my camera there but ... I guess a certain fear was there and so far I haven't actually shot from it.
Ryan, I think I'm going to fabricate a support that would accept my gimbal and be stable. However, we all know that a gimbal seriously restricts a wide range of movements so I wonder if some sort of padded ledge might be a workable alternative? Or maybe something partially inflated that behaves similarly to a firm pillow?? Anyone?
Jack