I have a forest river Salem hemisphere. In this case that really doesn't matter. For the past year my family and and I haven't been able to camp so it is at our local storage place which is gravel or rock I live in st Louis Missouri. I recently checked the tire pressures they are all down so first I am going to inflate them and from the post I have read I will be inflating them 10 lbs over required amount. So my question is after I return my camper back to the storage site which of course is out doors should I let the tires sit on the rock/gravel or should I back them on wood plank? Any response would be greatly appreciated.