>>677182it depends but for the most part at least in Virginia the area bellow the high water mark is considered state land. However if your going through parks, BLM land things change.
That being said asking for permission to go onto private land isn't super hard. However you often get asked to favors like fixing a farmers fence or cull deer/vermin
>>677182I would consider changing spots or re adjusting your sluice box. You should be pulling in ALOT more then that.
A good point is basically stay in the "crests" of river bend, as in the places you want to pan would almost be a straight line down the river without hitting any bends if you were looking down at the river from a birds eye view.