go for a hike in the woods and look for good spots that are not on paths that are near a water source. (pond, river, stream)
or drive around lightly traveled back roads and plant where you think no one will go during the grow. at leat 10 feet in from the street so no dog walkers of joggers see it.
i have always wanted to randomly plant 20 or more fem clones all over the place and mark the locations with a hand held gps unit (the kind for camping and hiking, not for cars) and then go back at the end of the season and see how many made it. kinda a set it and forget it grow, some would die, some would be discovered, some stolen but if 25% made i would consider that a success. of course id keep an indoor grow going just in case. besides cloning this would only be 2 days work. one day to plant and one day to go harvesting after midnight with your gps and a ninja suit.