waders and the hand winch usually sort the problem out. how big is your rib?
The real solution to this however is practice, it's how I got better, spend a quiet day on the slipway launch and recover the boat 10 or so times maybe have an experienced buddy with you and work out the best way for you.
When I used to instruct I really used to enjoy the slipway section but to me it's the most dangerous part of the whole boating experience. If you want to pick my brains (quite a quick process normally) call me on 07859886431 but be quick cos I'm back offshore soon .
Here it comes again, I don't stand a chance
Soul possession, Got me in a trance
Pullin' me back to you - Deja Voodoo