If you have kids younger than 3 yrs. you can stay in any resort.
If your kids are older than 3 you can stay at POR for the best price for only one room.
There is a trundle bed in the AB section and it would probably fit kids under 5 ft. tall.
You can also get a rollaway if you have taller/bigger kids but they cost per night.
POR is my favorite resort, best food court, wonderful pool, beautiful landscaping, boat ride to DTD.
POR is a very relaxed resort and if you want to relax after the parks it definatly would be the place to stay.