Dry site means a site for use by a camper vehicle where sewer and water connections are not provided to the individual lots.
How does dry camping work?
Dry camping, also known as boondocking, involves camping in an RV, van or motorhome with no hookups (no electricity or water) outside of a traditional campground. Dry campers set up camp on public lands as well as private places (with the permission of the owner), usually for free.