Re: Inflatable Kayaks
I've been using an Innova Helios II for a few months and it's been pretty stable. I went with the Innova because it seemed more durable for my dog. Plus with no 'skin' on the outside it makes it easier to patch if it became necessary.
As far as stability, I board through an open transom and it's never been a problem. I've never actually tried to stand up in it though, and it sounds like you may be close to that type of situation even if you're still holding the boarding ladder.
It tracks well if you remember to attach the fin, if you don't it'll be an exercise in frustration (learned from experience.)
It's not going to be like hopping in and out of a dinghy though.