If you want a carry rack the front hitch looks like a good idea. These motorhomes are very heavy at the rear, so putting this weight up front instead of hanging off the back will help balance the weight out. You just have to make sure that the stuff on the rack doesn't significantly block air flow through the radiator.
I pull a toad with my 32' class C, and I put a hitch-mounted bike rack on the toad. It works okay, but I have considered installing a front hitch and carrying the bikes up front.
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