I'm sure it's just gonna be fine, but I might move my plants back away from the from the road( about 1/2 - 3/4 mile in) but I get real paranoid about where I grow and have been know(by close friends) to camp out on the site or near it and watch for planes and people. as long as you cant see the road and the sound is faint in the background( or not there at all) you should be fine. just keep your garbage off the ground and paint tools ( that are to be left on site) in a mate paint( or hide them in the leaves and what not).
note. metalic tools such as spades hoes clipers ect should not be left on site. but if you must leave them paint them in black od green or tan mate colors to blend with the land.
second note. wear latex gloves, long shirt, long pants, hat , and put duct tape on the bottom of your shoes( no identifieing tracks should be left for the athorities( if it gets found they wont know its you who grew it)to find)