Actually we have found the opposite true. 1500 is quieter than 2000. I'm not saying you can hear a pin drop, but comparatively.
Ditto this, Brad.
1500 is more in demand because of its location and nearness to the Pool, campfire, and Trading Post. It generally has smaller campsites than 2000 but in a tent that is not as much an issue.
During the tent camping popular season (October to about May) 1500 stays full and the folks who come in just for a weekend mostly fill up 2000. The weekend-only folks tend to be families and kids run around the loops and play. The larger sites tend to lend themselves to multiple families staying on the same campsite with more tents and (at least) two cars parked there as well. And the weekend folks tend to stay up late and have more "fun" after bedtime. 2000 clears out pretty much during the weekdays as Breezy says (unless it's peak times like spring break or Christmas time).
I have a popup camper and used to try to use the Tent sites due to their lower cost. Just due to the numbers (1500 has only 21 sites and 2000 nearly 70) the odds were you'd be put in 2000 even with a 1500 request (because lots of folks request 1500 but few do 2000). But I've been in 2000 twice and bike/walk it often and that's when I decided to stay in the other Fort campsite levels.
I would stay in 1500 every trip if I could be assured of getting a site in it. But I can't be assured. So I don't book Tent sites often.
Getting a 1500 site is possible if you A) request it in advance, B) arrive early in the day and are willing to wait for the site to be ready (wait versus accepting a site in 2000 that's already available), and C) check in on a day other than Friday or Saturday. These 3 things in any mix can improve your chances if you want 1500.
My favorite sites (in order) that I ask for in 1500 are as follows: 1511, (1510), 1513, 1514, then any of the "Out"(er) sites 1514-1520.
1511 is spacious and backs up to the canal (quiet back on the canal). 1510 is in parenthesis because it WOULD be MY second choice but it has two trees in the corners of the gravel/coquina tent pad and I can't back the trailer between them but you could set up a tent. Then any of the sites in 1500 that border the two canals are preferable IMO. There are no canals near 2000 (although there is a storm ditch along the right side of the entrance to the loop).
That's my two cents.
Bama Ed
PS - here is a thread I did a while back that helps with 1500. Because the sites are a little smaller than 2000, people would often ask if their tent would fit on the 1500 sites. It has a picture of 1510.
https://www.disboards.com/threads/a-new-project-the-1500-loop-will-my-tent-fit.2901476/