We will have a family of five this summer and we'll all be cycling. Since we have a Suburban, pulling a trailer is no big deal, so our solution is to skip the $700 bike rack and buy a small $500 utility trailer that I'll get more use out of. Run cable locks through all the frames to the trailer and then lock the trailer to the hitch and then lock the hitch to the truck and voila! You're secure for a night in a hotel on a road trip!

Those small trailers are small enough that even a small suburban city home has *somewhere* that can be used to store it.