Is it ok to travel in the last trimester of pregnancy?

I am going to be 32 weeks on Saturday. I do have gestational hypertension and have to see my doctor twice a week. My boyfriend and I were planning to take a 10 hour car trip for Labor Day weekend, to visit his parents in Wisconsin (we live in Kentucky). I am just curious if it is ok for me to do this. I can't see any reason why it would be a problem. I know that I have not started to dialate yet.