Yes it is. They have a hand full of them. They don't do reservations on these, walk up only. If it has been excessively raining they are not available due to mud.
Yes primitive camping is allowed.
Absolutely.
Prior to Hurricane Harvey, yes, there were. I'd suggest checking with the park before arriving. There were some closures, but they may have re-opened by now.
Yes it is
I believe so
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