sports and recreation

sorry but I don't understand the question.  The board on which I sat was so close I could reach down and put my hands on the sides of the kayak.  I used this method, which is the same way I lower from chair to floor- I just put hands on the board and, with feet in boat, lowered my butt into the boat.  My w ords don't convey how easy it was, as well as feeling safe.  Sorry no pics.
Picture below is how you do do it riverside.  the top of the boat is an easy transfer  from the chair, then friends push you in.

No I did not.  I did you my Roho low profile cushion under me.  

That Roho does not put me up high enough in my chair so I use it on my Nu-step riding machine, mostly.  I did use it exclusively for several years before figuring out that my seat to footrest distance ought to be higher. Sharper Image sells a very low profile gel cushion that might be useful for many for short time periods and costs well under $100.