Everythings illegal. It seems. Well we don't want any bad press to hurt our hobby. It's already mistakenly looked down upon by many folks. Get permission, stay out of sight, stay in the fringe areas, obey the laws, dig small holes and fill them nicely. National Parks are verboten. State land/parks are subject to rules too; certain areas are detectable or not at all. Like I said, go at predawn, be done by 8-9am in the summer, stay on the fringe areas, roadsides, under/around small bridges, edge of fields, etc. Minelab makes a detector you can fold and put in a backpack. I've been tempted too, often thought of buying a low priced detector, storing it in the woods like a hollow tree or something, wrapped in a heavy contractor plastic bag or something, with small shovel, thus- you come as a hiker and leave as just a hiker taking a walk. Don't use headphones, turn volume down, look at screen? Stealth. Just a thought, don't try this at home kids, this was just my tempting thought.