I believe it detracts from the traveling experience to feel one must take extreme precautions to guard against theft.
It is simply not a serious issue, as anyone who has traveled and camped extensively can tell you.
That doesn't mean it never
happens, but one can be ripped off anywhere.
The incidence of theft in campgrounds, WalMart parking lots, off grid campsites, etc., just doesn't support such fears.
Take reasonable precautions, but don't allow yourself to feel that anyone around you can and would take what is yours if only they had a moment of opportunity.
Get out, experience this beautiful country and the people in it.
There...I said it.