I have USAA as well. . . .
Its covered but not much. Off the beaten path, 4 wheeling and punch a hole through the side by a tree branch? Probably not.
Someone slips and falls getting in or out of the camper door? Not covered.
Roof vent left open and water damage to the interior. Probably not covered.
Leave a burner on and catch the thing on fire? Probably not the camper.
Someone break into the camper and steal stuff? Probably not.
That's why I went with supplemental through Progressive. Actual separate RV insurance. Even covers road side assistance.