Minatawa,
The Eastern Gold Belt Runs from Maryland to Alabama.
As far as checking out the streams in your locality, get land owner permission or find a GPAA claim (if you are member).
test panning is different then recovering gold..
Test several areas along the stream you have questions about, look for gravel/clay contact zones, or dirt/bedrock contact zones, the closer that you dig to contact the higher probability you'll have of finding Gold.
Gold has a specific gravity of 19.2, keep that in mind.. Gold will not generally float unless it is so small, that surface tension via an air bubble makes it do so.
So the stratification will make the AU sink to the bottom of the pan.
Use a decent pan, Not one of the little black jobs, I'd recommend a Garrett Sluice Pan or Proline Gold Catcher.
Stratify your test pan, put the material in your pan, swirl it around for a while before you start sluffing off the lighter stuff.
I'd recommend getting a GPAA membership as a starter, it is worth the $79.50 (in my opinion.) Included is a Proline Pan, snuffer, and panning video, and claims guide.
Once you get some "color" set up to go.
I'd recommend digging your concentrates first, classify, classify, classify.
1/2" first then 1/8"
I classified to 20 mesh where I know the gold is fine. I do classify smaller then that when I bring concentrates home.
I'd pan over a pan.
If you can get a small sluice or hibanker do it. one of these things can do a lot of work for you. And bring your concentrates home to pan into a tub so you don't lose any AU.
I've got a bunch of links I will share on this thread when I get time.
Black Sands do not always indicate gold, but if gold it present general black sands are present.
Seeing blacks on the sand bank doesn't necessarily gold, you can see pyrite and mica more often then naught.. Gold is heavy, mica and pyrite has a specific gravity of about 3-4, quartz gravels has a specific gravity of 2-4, and you may want to watch the quartzy pieces as sometimes they carry gold on them and can be sluffed from the pan or sluice easily, (Don't want to lose them!!) this is why you classify you maybe able to see AU/Quartz specimens easier on a classifying screen where you'd miss it other wise.
Good luck !!