Dealer quoted $700 to run wire for backup cam, Need Advise

3 words
RV MOBILE REPAIR

When you get to your next CG ask the CG owner who they use for mobile repair. Call them. Get your lawn chair out and open a cold one. :C

You'll see how easily it is done and for a price waaay lower than what you were quoted. No fuss no muss and you don't have to drop your RV off for months and hope they get to it before the snow flies.

Mobile repair will come out to your house too.