Michigan state parks tend to have some pretty big sites....at least the ones I have been to. I towed a 30 Aerolite with a 2006 F 150 with the 5.0 liter engine. It towed great. The weight sticker on the door assumes a full tank of gas and about a 150 lb driver. Depending on what you have (tow package, rear end ratio, etc) you should be fine. I do not worry so much about GVWR as I do rear axle and tire limits. I tend to also look at how far down the truck sags and where it ends up in comparison to the "stops" above the axle. With a weight distributing hitch, I bet it won't sag much.