Hi there Fredboy. Thanks for your question. My family and I have tried a couple of places that worked out ok.
I have a couple of questions for your first.
1. Where are you close to?
2. Do you plan on sleeping on your boat?
3. Do you plan on putting it on the beach or doing it at anchor?
I have done a little of both, but my favorite is to do it on anchor in a cove. Reason being, no spiders or snakes and no worry about the wind coming up and banging me against the shore.
But if you have a nice sandy beach and it appears to be a calm night it is great to just beach it on the sand.
We have tried Martin Dies State Park Resivor (a 6 on a scale of 10)
My favorite was actually Lake Bastrop (near Austin) because it has cabins.
Lake Livingston State Park was also pretty decent.
Look forward to hearing the answers to your questions.
Here are some pictures from Martin Dies