For the OP (Original Poster),
Like snowmedic, I too have requested 1500 in the past and been given 2000. Since you have a cart it may not be as much of an issue. Like he says, there are 20-some sites in 1500 and 60-some sites in 2000, so the odds are on a random assignment basis that you end up in 2000. But lots of folks request 1500 as he said for its central proximity to things.
The one thing about 2000 is there are large groups of campers who request the group campsite Creekside Meadows which is already booked. If you end up in 2000, try to get either a very low number site or a very high number site (I think the highest is 68). They put groups who can't get Creekside down in the 20's-50's sites and on the edges if there are that many.
I wrote a post a few months ago about requesting specific FW loops in My Disney Experience (
MDE) which becomes available at 60 days before check-in (also known as on-line check-in).
Requesting Loops In MDE
My advice would be to request 1500 via MDE and then try to check in as early as possible on the day of your arrival. Ask for a 1500 site even if you have to wait to set up on it while it's cleaned (if someone is checking out that day).
Bama Ed