I have had a completely different experience there. Twice now, we have arrived at the pool, fully clothed, and asked if it would be okay if we just sat there for a bit. No problem at all we were told. Last Jan, during Marathon Weekend, my dd and I were waiting for my dh to get to YC to checkin (he was staying there, while we had arrived at POP the day before), and plopped ourselves down in two chaises in the pool area. Now, they were't near the water, in fact they were towards the rear, closer to the resort. The CM handing out wristbands had no trouble with that.
I just wouldn't expect to show up in a bathing suit top and shorts, with a towel over my arm and expect to be allowed in with no resort key. But, jeans, sweatshirt and sneakers? Guess that was okay.