Depending on your situation, you may find that it's more cost-effective to stay in a Value resort and pay for an upgrade to the standard dining plan.
For example, looking at late September, 2016:
Caribbean Beach standard room: $215 Su-Th, $252 F-Sa. (The other three moderates are within a few dollars of the same price)
Pop Century standard room: $138 Su-Th, $172 F-Sa. (The other values are also similar)
Cost for 2 adults, 1 child to upgrade dining plans: $41.49/night ($19 per adult, $3.49 for child. Infant doesn't get dining.)
So Pop Century
Free Dining + Dining Upgrade is $179.49 Su-Th, $213.49 F-Sa
For the extra money at the moderate, you'd get queen beds (instead of doubles), a nicer pool, fancier grounds, and a table-service restaurant. If you're there for only 3 days, something tells me you'll be mostly eating at the parks and not as likely to spend lots of time at the pool. But I know I have trouble sleeping on a double-size bed, in which case the moderate is probably a good upgrade.
As to which moderate is best, certainly there's a lot to like about Port Orleans (both parts). The theming is probably the best, and it has good pools and activities. It's relatively easy to walk from one to the other, so even if one is blocked out, the other is a good bet. Caribbean Beach and Coronado Springs are very similar as far as location and room quality. Coronado Springs is a convention hotel, so the food and whatnot stays open a little later. Otherwise, it's kind of six of one, half-dozen of the other, really.
If you do think a value is an option, I like Pop Century much better than the All-Stars. It's newer, nicer, and closer to places you'd want to go. AoA is also nice, but the regular rooms are pretty much always blocked out for Free Dining.