you need to get to checking to find out if there are any private run ways in the area, aw well as check to see if there are any "learn to fly" places around. very possible it is either one.... but you need to also take a pair of binoks with you and the next few times you see the plane you need to look up and get its call letters on the back end of the plane. Might be different planes.... If you find out there is a private air strip out there, take a ride and see if you can find the plane.... go in and bullshit with whoever and see if you can get some info... more than likely it is a private pilot enjoying a hobby.... but like it has already been said... you cannot be too careful...