Hi Wenpop,
We stayed at POR last May. We were actually 5 plus an infant. The buildings in the Alligator Bayou section have trundle beds and those rooms will sleep 5. We were in building 14. Both 14 and 15 are close to the pool and the food court. About a 5 minute walk. The resort is beautiful.
Just note that the buildings are 2 stories and there are no elevators, so if you need to be on the first floor, make sure you request that.
Have fun