Travelers World RV Park is excellent and close to the downtown area/Alamo. They do have a bus for transit to the Alamo area. Downtown San Anronio is NOT the area for a large RV.
Just spoke with a large RV dealership in Texas. They had two months of record sales this year. Sold 513 units in June! Will not publish their identity, as I was entrusted with the information. RV Business appears strong.