At minimum, empty freshwater tank and run pump until it is out of water. Drain your water lines and water heater completely then blow the lines out with an air compressor. Make sure to blow water out of each faucet, shower, outside shower and toilet. Dump RV antifreeze in your drain traps and some in the toilet to keep the seal wet.
I don't have a factory roof ladder so I use a 12 foot step ladder to get on the roof.
2014 Jayflight Swift 264BH
2015 Ford F150 EcoBoost