I agree that the roof
is the best place for the bikes to ride, but I also understand that Candi is talking about a van, and that roof is high. It would be awkward to get four bikes up there.
If the extended hitch type of rack works for clearance, the next issue is hitch height
. I have a moderate rise in my ball platform to put the top of my ball at the right height for my Boler's coupler (16"). The Scamp
likely has a different (lower?) height. The Cabela's rack does not have an extended receiver box; instead it is a long ball platform with a very small rise (probably 3/4" or less). If that is not quite high enough, an extra-tall ball can be used (further compromising clearance), but more than a couple of inches of rise requirement calls for a different hardware approach (such as the one Peter described).
If that Cabela's unit is the selected design...
Cabela's house brands are normally available under other brand names. In this case, the linked model appears to be SportRack
towing hitch bike carrier Frontier A30414TW200
. Canadian Tire carries these here, and I'm sure there are many other sources.