To the original poster:
I REALLY don't see what the big deal is... whatsoever. I would DEF say ASK at the front desk OR the lifeguards. I love POR but I dont think the kiddies will be too thrilled with the main pool there. Maybe go over to POFQ (which btw you are allowed to use) the dragon pool might excite the kiddies more.
Also yes, I know the All-Stars & Pop Century lack the waterslide... but I think as a kid (well I know when I was a kid) Pop is very cool. Maybe even take a little walk around (cause I dont think the kids will understand the POP theme) You def need to take a walk around the other All-Stars... they will be in awe.
I can see when ppl get all tied up in a knot about pool hopping. I can see (lets say) your at CBR and you decide to go over.. to I dunno the GF to use their pool. THAT seems wrong. Or I've heard stories about ppl who are staying totally off property using a disney-resort pool... ok thats pushing it? But when two famalies are staying at different resorts and want to spend some time together... come on ppl. What is an extra chair here and there or a a couple extra kids in the pool going to do to you? Get over it.
And also to the OP... we've been there when my older sister has been at CSR or another resort and we've gone and visited them so I can play with my neice and nephew in the pool. And guess what? We ended up buying drinks/food by the pool etc... in the end giving Disney more of our $$ no doubt. My parents are also DVC and the last time we were there we didn't even stay on points and asked the front desk at a couple of places if it would be OK if we sat by the pool/beach ( lol we didnt even go in)... and *gosh* NOBODY CARED. And the fact that the other family is also a Disney resort guest. I REALLY don't think Disney even cares as much as half of the ppl on here.
So I say... enjoy your time together at whatever pool you end up going to. Ignore some of the ppl here, they need to get over it.