Which is a better placement for a sat dish on the Ground or on the camper.

I have heard that when people walk by or cars drive by the signal is interupted, and I was thinking on top of the camper it would loose the signal if someone got in or it moved around a bunch.

So whats better a tripod or a mount on the roof?

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1988 Chev Itasca 24' Class C
[url=http://i27.photobucket.com/albums/c165/paulq1319361/Itaskacamper.jpg]Picture Link[/URL]

Well it really all depends on the location, sometimes I have found good spots to place it on the ground where nobody would walk past other times I put the portable dish on the bed of my truck.

The permanent roof mount models are really good and don't loose the signal while walking inside the RV.