You are correct that 2000 is the Tent/Popup loop. 1500 is also, but it isn't open right now. All sites at the Fort have electric, water and cable, so no generators. All the other site types except Tent/Popup also have sewer.
What to bring? Since you will have electricity, a fan or A/C unit. October will still be hot during the day and may not cool down a lot at night depending on the weather. Camp lights are also great. I see a lot of Christmas or patio lights strung around the site. It makes for a nice atmosphere. Other than that, normal camping stuff to be comfortable.
The 2000 loop is a fair distance from the Outpost (bus stop to the parks and DS) and the Settlement (boat to MK and trading post and restaurant). The Fort has an internal bus system that is pretty good, but some people recommend getting a golf cart (the Fort rents them or you can use an independent off site vendor).
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