My boss asked me if I wanted to go to the largest trade show for the industry that I work for. Given I just switched industries a year ago when I started this job a year ago, I very excitedly agreed. The problem is it is a two-day/one-night trip, six hours away, and I'll be 24 weeks pregnant-- so twelve hours of sitting in less than 48 hours. My OB cleared it, but suggested that I stop every hour to walk around for a minute. I'm going with at least four other people, so I don't really want to inconvenience them too much. Would elevating my legs (i.e., putting my overnight bag under my feet like an ottoman), stretching in the car (ankle flexes, knee bending), hydration, and compression socks be enough if we stopped only once or twice? Any other suggestions for surviving a long car ride?