Loop 1500 and 2000 are "designed" for tent campers. They have water and electricity only (no sewer) and are a bit less expensive than the full-hookup or preferred full-hookup sites.
They also are made a little differently that the full hookup sites. They have more "sand" area for tents and a shorter driveway, where the full hookup sites have a longer driveway and less sand area.
Loop 1500 has about 32-33 sites and is very centrally located in the campground. Easy biking distance to either end of the campground (where transportation is) and across the street from the Meadows Pools, recreation area, movie/campfire, and Trading Post. There is one comfort station for the Loop and since the loop is small, it is a short walk from any site to the comfort station. (Sites 1501 through 1507 are the closest, but are also close to the bus stop, so bus noise is heard). The only downside to Loop 1500 is that it is older and some of the "sand" pads are small even for tent sites. So if you have a large spread of tenting/awnings, then a couple of the sites may be too small or the grill, tree, or picnic table may get in the way (You can move the picnic table). (In my experience 1506 is useless as it is very narrow and has a tree in a bad spot). 1501, 1503, and 1517 all had plenty of room for about 20x30 worth of tents and awnings.
Loop 2000 has about 70 sites and is a bit more remote in the campground. This loop is designed specifically with tent campers in mind. The "sand" pads are very large with a "jut out" for the grill and picnic table. However, the loop is quite large. There are 2 comfort stations, and it is possible to be quite a distance from a comfort station. There are plenty of sidewalks leaving the loop and it's not a bad bike ride to get to either end of the campground (for transportation) or over to the Meadows complex for the trading post, campfire, or pool.
Now having said that about the partial hookup loops, tent campers can stay in "any" loop in Ft. Wilderness. There have been folks set up with tents right next to million dollar motor homes. The only restrictions are that your "stuff" has to fit on the sand pad and driveway, you can't spread out in the common area.
It's hard to tell you which site is best as far as size goes, except for folks giving personal recommendations on sites they have used. Every site is different in dimensions as Ft. Wilderness built the sites around the existing trees and landscape. Most every site has plenty of trees/foliage in between them providing plenty of privacy. However, the hurricanes have diminished some of that.
Here is a link to a Ft. Wilderness Map
http://www.allearsnet.com/acc/ftwmap.jpg
Here is a website with lots of info about Ft. Wilderness
http://fly.hiwaay.net/~jlspence/faq_fw.htm
I hope I've been helpful.
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). But it is fine for me, so don't need a huge site. 
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