First, just so you know, there are no 2BRs in the buildings with access to the elevators (that would be Bldgs 11 and 12). All the rooms there are either 1BR or studio. Further, Bldgs 11, 12, & 13 are the farthest buildings out from the pool. Those buildings are at the very front of the resort while the pool is about 2/3 of the way down to the other end of the resort. That being said, it is a small resort so the walk isn't bad; however, if you have mobility issues, then yes, it would be a bit of a haul to get to the pool, Tide Me Over, and the Mercantile which are all co-located.
If you have a 2BR villa, then you will not be assigned to 11 or 12. The closest buildings to the pool you could get would be 22, 23, 24, 26, & 27--23 and 26 have rooms whose balconies actually overlook the pool deck. There is a handicap accessible ramp to Tide Me Over and the Mercantile that is mere steps away from 22, 23, & 24.
Second, there are actually two grills near Bldgs 11, 12, & 13. There is the aforementioned large brick grill outside Murgie's Den. A second, smaller grill is located behind the Bldg 11 on the marsh side, along with three picnic tables, a hammock, a two-person porch swing, and a couple of Adirondack chairs.
Finally, there is handicap parking scattered throughout the resort. Best wishes going forward!