Opinions on traveling during 3rd trimester

👶🏽👶🏽👦🏽👩🏼👨🏽 • Wife and mother of a two year old boy! And expecting twin boys Aug 2015
I'm 31.3 weeks with fraternal twins. I've had so far an amazingly easy - no complications pregnancy. Dr told me he doesn't recommend me to be traveling (4 hours from home) this coming 3rd and 4th of July. I'm following his orders, but I also wanted opinions of others thoughts on this topic.