Remember BLT is part of the CR, so you can also use the pool at the CR.
We found BLT pool a little crowded in the afternoon with little kiddies and families, my boys are bigger, so we would go over to CR, where the pool is very big, and they also have a cool round pool near the lake.
The whole BLT at CR is a great spot, it is very easy via the walkway or outside to go back and forth between the resorts. My boys can not wait to get back next year....
I completely agree with you Pat! If you really want to get in you can so IMO the "security" is more of an annoyance for people legitimately staying there.