If you just need to run a cord from where your Gen is to your RV electrical hookup, you should just need a 12 or 14 gauge extension cord long enough to bridge the gap. Plug it into the Generator then using a 15Amp to 30Amp adapter, plug the other end into your RV's electrical cord. This is the cord you usually plug into the 30A outlet when hooked to shore power. I say 30A but if you have a 50A then get the adapter for 15A to 50A instead. Start the generator and you have 15 amp power to the coach. It may not run your AC though.
2016 FR3 28DS
Past 2012 Forest River Rockwood 2104.
2016 Nights Camped = 34, 2015 = 21, 2014 = 22, 2013 = 24