I've gone to hitch carriers after experiencing too much bounce from a regular carrier that damaged a wheel. I've also gone with a real rigid carrier made by BoneLocker. Installing a hitch is not a big deal, and you don't need an expensive hitch is all you're using it for is to attach a carrier and a couple of bikes, so an inexpensive class 1 is more than you need.

See http://scsrack.com/ I think personally this is the best hitch rack on the market, read about and others mentioned here and you decide which will fit your needs the best.