Question about wheel jacks.
Lifting the tires off the ground is going to put additional stress on the frame in a way that it wasn't designed for. The trailer was built to have the wheels on the ground. In my opinion, using jacks to stabilize is ok but not to lift the trailer.
Covering the wheels is a smart idea.
2013 Jayco JayFlight 26RKS
2013 Ford F150 Ecoboost FX4
2003 Coleman Bayside / 2011 Jayco Jayfeather X20E -- RIP
2012 Tacoma Sport DCSB / 2013 Tundra SR5 - RIP