Something like this
http://www.harveynorman.com.au/intex...Q&gclsrc=aw.ds would be useful for you but I would suggest cutting a piece of 12mm ply to fit in the bottom to stop it folding in the middle from the weight and wetting you. My old man and I did this once on a trip to hexham island out from stanage where we had to anchor the boat 200 odd meters out because of the 8m tides and it worked a treat. Was still a little unnerving kneeling in that little thing pulling yourself in to the beach via the anchor rope and watching the sharks feeding on the fish frames we had just discarded directly below