We like H&H Atv park it's in Jesup Ga. (about 1.5 hours or so from Jax.) it's small but pretty nice we always go during the week and usually have the whole place to ourself's it's likely a zoo on weekends,Camping is free but i don't think he has hookups,he does have a covered picnic area,a real bathroom & a shower,BBQ grill & hoses to wash your atv's,He will not tolerate Any drinking on the property
http://www.handhatvridepark.com/