I have seen people doing it but not sure if it's officially approved to do so.
yes as long as they are not doing a boating event and your RC boat is not considered to be in the way. There's one Lake you won't be able to use it because it's used for public swimming and activities that I believe is run by a private company and they don't want RC boats hitting anyone but there are sections you should have no problem operating it in I recommend you use the south side of Forest Hill there are more places you can go without any interference and they have a nice area where you can stand on the dock and control your RC boat.
I would call to make sure
Absolutely
Same as what he said, I believe you can but I dunno what the rules are with those
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