Been thinking about this for years. Was finally going to plan a few trips this winter to PA resorts and ended up having a major repair done to the RV that killed the whole winter (it's still not back). That said, I can tell you specifically that Blue Mountain has a dedicated lot but you do need a permit and they charge for it. Weird since it's the only thing they use that lot for and it is just a gravel lot. Elk also gave me permission. Not sure about the others in PA. Can't imagine where you would park at Camel Back or a few others. Guess it depends on the specific resort. So my suggestion is to do what I did and contact them before going to make sure you are permitted and to find out the details. We intend to do this at least a handful of times next season at this point.