I have figured out that by wearing camouflage (not talking like realtree or ghillie suits!) just wood specific colors that blend well, an OD green tshirt and camo shorts (i wear those regardless on warm days)
its harder for someone to see you "walking around in the woods" its not all that suspicious if your are just going about your business.
Another technique that i use, if i feel like I'm about to be seen by a muggle or someone is being nosey, i will take the cache with me, and wait it out and then return it. so that way they don't take the cache.
or just simply walk away with whatever i had in my hand at the time, just real calmly walk around like im on the phone or i stare at my GPS alot, asking my partner weird questions like " hey did you know the sunset is at X time tonight? cool!" or "hey X o'clock is a good fishing time for today!"
