If your RV is so out of level you are concerned that the slides may be impacted-------WHY are you camping so out of level? Level is NOT the concern. Twisting of the chassis is the concern. If all 4/6/8 tires are not in a depression or large hole, you can extend the slides. Pointing downhill or uphill or leaning to the sides will not cause a problem with the slides. They had slide rooms way before Leveling jacks became standard. They still have slide rooms on Motorhomes and Trailers that do not have a leveling system. Doug