I bought a pair of
Condor Pit-Stop/Trailer Stops. Excellent product.
I also built up some 2x4's and put that blocking under the frame just behind the oil filter. That way, I brought it down on the frame instead of the suspension.
My anchors are these:
with 5/16" bolts and 2" fender washers underneath. Went to Sam's and got these tie-downs:
The bikes do not move, period.