The smallest footprint is POFQ, very compact.
CBR is very large, and the Ft Wilderness Cabins have a lot of walking even to meet the internal bus; definitely avoid those.
The value resorts have a bookable category for "Preferred" rooms which are closer to the main building (dining, transportation, etc.). Moderate resorts also have the Preferred room category but close is a somewhat relative term as the moderates tend to be more spread out to begin with.