I have worked literally over a hundred rec games by myself. I always work FT line to FT line and alternate sides. I do try to spend about 2/3 of the time opposite table side just to stay away from the coaches.
Administer free throws from the trail position and most of the time you can stand away from an inbounder and bounce the ball to him or her to inbound.
Don't ever be uncertain about an OOB call. Remember the referee's motto: "Occasionally wrong - but never indecisive".