An answer in simple form...if you have alot of stuff.....2000 is for you, the sites are a good bit larger than the 1500 sites. On my last trip we were in the 2000 loop,we had a 20x10 tent, and a 13x13 screenhouse, a golfcart,and a utility trailer on the sandpad,with a cherokee in the driveway...still had some room to be comfortable in. None of the sites are exactly the same, but I can guestimate that site 2009 sand pad was about 25' deep and maybe 16' wide plus the paved driveway. Some are a little smaller, some are a little larger. 1500 loop sites are smaller for the most part, but are centrally located in the campground...so you sacrifice size for location in the 1500. Hope this helps a little.