Laurie:
Let's start with the good news: either resort,
Port Orleans Riverside or
Caribbean Beach Resort gets a thumbs up from me if you're staying in warm weather to enjoy their pools. If you don't plan on spending at least one afternoon to soak up the water/fun station at CBR's Pirate Ship-themed pool, though, with the children, I'd recommend Port Orleans Riverside. With two really young children, either pool is fine so the tie-breaker for me is what the
adults will enjoy. And, hands-down, the boat ride to Downtown Disney from Port Orleans makes it pretty special.
Now the bad news: there aren't any fireworks views from either resort. But you can see the Magic Kingdom's display from the Polynesian Beach and Epcot's fireworks from the Boardwalk. Access to both are free!
Wishing y'all a magical vacation!
Whitney