don't worry you are probably just near a small airport, as my grow is, i see them fly over all the time, for the most part planes go too fast to be used for pot spotting and they don't use choppers untill fall and only in high traffic areas. if it's really obvious you might get an ocational low chopper that might happen to spot it just as he is passing by and reports it, so just don't be too obvious. don't leave any garbage and camoflauge all pots and containers with surrounding vegitation, this will help with hikers as well. because a good percentage of people would never know what marijuana plants look like and walk right by as long as it looks like it grew there wild.