Well, you can't have both. Loop 2000 is far away from pets and the pool. It is also so large, you may have quite a walk to a CS. We were in that loop 2x, once we were across from a CS, once we had quite a walk.
Now, loop 1500 is next to a pet loop (but it is NOT a pet loop). I did not even know we were next to a pet loop until I needed the CS while it was being cleaned. Even then I only knew it was a pet loop because of the sign on the way out saying no pets past that point (or something to that affect). Depending on why you want to be far from pets and how far away, 1500 may work. 1500 is the perfect loop if you want to be near the pool. You just walk across the street and over a foot bridge. A nice quick walk. I like it because you don't have to ride an air conditioned bus after being in the water. Site 1503 is right next to the CS and you can pass through the brush to the bus stop (although I had to go around with the stroller). It is a small loop so all sites are fairly close to the CS, but let them know you want to be close and they will try to put you in the first few sites. Site 1503 was our favorite so far. Of course we are now in a TT and cannot be in that loop anymore.
If you request a specific site, let them know why, such as "near a CS", so that if they can't put you in the exact site, they can accomodate the "near a CS" part.
Happy Camping!!