Las Vegas GPAA can help you.
We don't have streams and rivers to prospect in, Nevada is a desert. You can prospect on MOST BLM land and in Nevada they recomend you contact the office in the area you want to prospect in. If you are a GPAA Member you can use the GPAA Claims as well as the one across the river in Arizona.
For Southern Nevada you can call DeAnna (702) 452-1049 and ask her for details she is the Chapter President, she can also direct you to information for the Reno Chapter.
Do not get caught on any of the Lake Mead Area prospecting they dont play and you will loose your gear and get a huge fine. As for parks most are cool metal detecting around as long as you are just being casual and not leaving behind holes. But most are picked clean by locals who regularly hunt the volleyball sand pits etc.
Schools in southern nevada, don't go near them, depending on who catches you between school police (no sense of humor) to metro could be a please leave to heres a fine and impound your gear. I can not direct you as for Northern Nevada as each county has its own ordanances.
