Winegard Sat. Antenna - Tripod, Picnic Table, Other?

We've been using ours daily for 2+ months(over this time, we have used it in 9 states and 22 campgrounds). No tripod. Depending on the circumstance, we put it on the roof, on the ground, on the picnic table - anywhere we think the signal is best. We have never been shut out completely though we have had a couple of occasions (in heavily treed campgrounds) where we could only pick up two satellites. A tripod would not have made a difference.