We have stayed at both the Sheraton Vistana and the Sheraton Vistana Villages (most recently-July 1-7, 6 nights for $837 all included). Both are great and the deals being offered at the villages for non housekeeping rooms are great. Just note, that when booking a one bedroom, we found that you could choose either a 500 (apps.) sq./ft/ room or an 800 (apps.) sq./ft. room for the same cost. We got the 800 and it had a full kitchen, washer and dryer, dining area, family room, master bedroom, private screened porch and three section bath (all inter-connected, but a shower and sink in one section, a toilet in another and a sink and jetted tub in the third). We put 5 in the room (using a couple of air mattresses) and it did not feel to tight. There is plenty of room. We have also stayed in the two bedrooms at the Vistana and it was huge!
Both properties are close to one of the gates and have great pools. PM me if you are interested in pictures.