Welcome to the forum! We are almost all Thor owners here, so it helps if you change your ID listing to the brand and model of your coach. If you can't find the answers you want by the search feature, ask. Good knowledge base here!
Some of us forum members are getting together at Brooksville this weekend. Here's the info: http://www.thorforums.com/forums/f28...lly-10408.html
Join us for part or all, with or without your RV!
Opinions vary, but you'll find most are more concerned about corrosion of the cylinder than flat spots. I leave our jacks up, and move the coach a little when I run the genny every couple of weeks. The tires might seem a little stiff until you drive a few miles, not a permanent problem. Probably not much different if you leave the jacks down.