We tent or shelter camp and have never really had a problem. We put our bikes near our tent at night time and during the day we have them with us most times. We did have some young boys take our firewood (we brought from home) but we talked to the dads and they gave it back fast! They didn't like us the rest of our stay but it was something we could live with.
Element, you are right about those Brazos Bend raccoons, we had friends camp down from us last year and the coons got in the back of a truck bed and pry open a cooler to get summer sausage and rat cheese. Thieves, indeed, but so much fun to watch the shenanigans.
Sandy