The gen surg --> PRS route is collapsing rapidly, only 68 spots left for the independent match this year so I wouldn't plan on using this as your "back-up". Last years integrated match had 207 spots (not sure what the total is for this years match, but would expect a higher number given the rapid decline in independent spots in the SF match over a relatively short time period). Think your best bet would be to become someones publishing machine with over 20 publications and try for integrated, interview at a couple gen surg spots in case things don't work out, then again in residency become a program directors research work horse and hope they feel like you've paid your dues. Either way its unfortunately a tough road.