Just go and hitch while wearing your pfd. You will be surprised how fast you get a ride. There are LOTS of boaters in the valley, and even if you somehow cant finagle a ride at the put in or takeout (very busy this time of year, lots of people) then there are lots of them driving by who would love to help.
It would help if you clarified your trip plans. By Gunnison do you mean North Bridge? Or by Gunnison do you mean the WW Park? Or McCabe's Lane?
"Don't f$&@ing eddy out, just run it! Whaddya doin??" -LMyers