Before buying a cheap trailer, or trying to stand one up or put one sideways, go rent a u-haul (or equvilant) trailer it's only like 50 bucks or so for a weekend put one bike and all your gear in the trailer and one bike in back of truck and problem solved! I've done it for a long trip and it worked great, split the cost of the trailer and split the cost of the gas, works out cheaper for both of you.