My suggestion to you would be if growing in your yard are these. Make sure that you have something to break the outline of your plants from above. Under some trees or some bigger plants. If your yard has no other potted plants in the yard, dig holes to set your pots into at ground level. They will spot the pots and want a closer look, if you have never been in a low flying aircraft over residental housing, those containers look like a big sign. If you have other plants or don't want to put your containers in the ground I would suggest getting other nursery plants which will be about the same height of your girls when they are finished.
The other comments certainly have their merit, but I wouldn't bet my house and property on not being the 1%, if that is an accurate percentage. Just break up your plant outline, make the containers hard to see.
I hope this helps or at least gives you something to thing about. Best of Luck to you