I always report atleast 2 nm away from the jgg, I think people report it so early so they can be cleared into class c. Atleast thats why I report a few miles from the jolly green. If you work Atc at tucson you'll here me this afternoon since ill be going to ryan for t&g's but don't be mad when I come back to tus and report 2 miles from jgg.
Here is a picture of some water south of KRYN not sure if its the pool your talking about. Second pic is KRYN. Third pic is Old Tucson Studios notice how many cars are there not the tourist destination that it once use to be. Sorry about the randomness of photos.