What now? Have my route mapped out...

So you are going thru New Found Gap in GSMNP? AS a new RV driver (we assume) you need to understand how to go down a LONG grade. Going up is not a big problem, just let the tranny do its thing, going down is a whole other issue. I live near the GAP and every time I have gone thru there I see RV's where people have burned up the brakes. Use the engine and tranny to slow your descent, gear down and don't worry about the RPM's too much, just make sure you don't red line. There are lots of turn outs on the GAP road so don't be afraid to turn out and let the brakes cool if you think you need to. Seriously, be careful on that road, its steep and twisty but do-able, not to mention beautiful scenery.