Have a 2002 EXL w/Nav. I have purchased a Stowaway2 hitch mount cargo carrier. The carrier concept I love, however it has a 98 lb wt unloaded(200lb cargo capacity). I am planning a family trip in two months, and having the cargo carrier loaded, and the back of the van loaded, I think the van will be riding uncomfortably low in the back. Will heavy duty shocks work? Air Shocks? Any advice? Would prefer to stay away from Air shocks or major mods.