What is the longest length of an RV that for Fort wilderness campgrounds can accommodate.

Lots of info on the website. Lots are motorhome specific, some bigger than others

Premium sites Room for larger style RV  Accommodates equipment on a concrete pad up to 18 feet by 60 feet  Sleeps up to 10 Adults From Disney world website

The premium sites have 18ft wide and 60ft deep concrete pads on the sites

I am not sure we sleep in a tent for a week.

If I recall correctly, the site we had last month was 50'. I think that's the longest they have. It accommodated our 36' camper, plus our truck. Hope that helps.

I think they can accommodate any size, but spaces may be limited. Best to call directly