It's dangerous if you don't stop and walk/stretch every hour and a half according to my obgyn, but, other than that it's fine to travel as long as you are 34 wks. On the flip side, everyone's health status is different so I'd discuss travel with my obgyn if I were you. Hope you get to go to vegas and that bf stops in route for the safety of you and baby...best wishes.
That's a question for your doctor
I was 15 weeks I went to la(18hours). We stoped but not as often I dont see what could be dangerous. Just wen u do stop walk for a bit and stretch.
It is best for everybody to not be sitting in 1 spot for longer than 2 hrs at a time, to prevent blood clots. Being pregnant makes you higher risk.