Preventing a leaky entrance to the spraydeck.

I put a $1, 20 inch pool tube around my 32" waist. I bought it at Walmart (the tube, not the waist). I have to stretch it out a bit as I pull it up my thighs. Once I’m in my boat, I then draw the deck over the top of my tube and tighten the drawstring. It works pretty good, I can spend all day running class ll and some lll without having to empty my boat. I found that the higher my seat is the better as well. I was curious what methods you use?