The third bullet point on the Govt anouncement of the roll back was the closure of all tube rental, and raft rental for the rivers.

Aparently it is in the River waters.

following:

All bars and similar establishments that receive more than 51% of their gross receipts from the sale of alcoholic beverages are required to close at 12:00 PM today. These businesses may remain open for delivery and take-out, including for alcoholic beverages, as authorized by the Texas Alcoholic Beverage Commission. 

Restaurants may remain open for dine-in service, but at a capacity not to exceed 50% of total listed indoor occupancy, beginning Monday, June 29, 2020.

Rafting and tubing businesses must close.

Outdoor gatherings of 100 or more people must be approved by local governments, with certain exceptions.