I would not cut a day. CBR has the best pool on property for kids the age of yours. I would however switch from a pirate to a preferred room. The monorail is nice and being able to walk to MK is great. But I like,more days, more resort theming and really love CBR. But the pirate rooms are a hike, preferred is convenient for kids, grandparents and therefore you! You can take midday breaks quite easily when staying at a mod. We take midday breaks every day, every.trip and the travel time on busses to a mod is fine. CBR is very centrally located. From MK the CR is great, but there are other parks at WDW, and two of them will have you bussing back and forth if you stay at the CR. The pirate rooms are cute, but the Nemo theme in the other rooms is cute and brighter and being close to the food court and the main pool is very nice. Either way, you will have a great trip.