I asked the same question several months ago. A lot of good info came my way from knowledgeable people on this forum. You can check back with the search feature. Personally, I opted to go with an Kobalt hot dog air compressor that runs on 120 current. I did that because the unit is very compact and fits into my basement very easily and I only have to travel a couple of hundred miles to a seasonal site, so having power available is not an issue. I will air up before leaving my home or the campground at the end of the season. I carry a spare tire so if a flat occurs I can simply change it. The compressor is also useful for blowing dirt, pine needles, etc. off the top of the slides, inflating air mattresses and swim floats, and comes in very handy for blowing water lines when winterizing. I paid $130.00 for mine at Lowe's and spent another $50.00 or so for the air line, and air gun.
I always carry a 12 volt unit in my truck box that is part of a Slime tire repair kit, that claimed it was good for 150.00 pounds. Then my son got a flat on his F250 and the unit would not pump more than 35 pounds into it. May be a lemon but that made my decision to go with a full power compressor.