We were at the OverlanderOasis in January. It is small, there were 5 rigs in there and we were the largest at 25' and it was a tight fit. They work primarily with the overlanders, we had a great time with people from Belqium, Netherlands and GB there at the time. It is in Tule about 3 blocks off the main road and colectivos or taxis into Oaxaca are easy. The street food in Tule is great. Call before showing up to check on space availability.