BeeMan,
Yes, try GPAA, and UPI. United Prospectors Inc.
GPAA, would probably have more extensive coverage.ie: have more property,than UPI.
Check there first, with GPAA.
Then next, would be consult a map of your travel.Then go to the websites
where you intend to go, and ask them. Usually no problems. Here in
Kaleefornia, the rules and regulations are getting very stupid.
They think they "own" it.
And another thought,join a gold panning/prospecting club in your area.
Hope your pan is all yellow.
I'm a life member of UPI.
Hope this helps.