Opinion on Vacation at 35 weeks pregnant??

Every year I have a week long family reunion/vacation at a beach house about an hour and a half away from home. I haven’t missed it in years and this year I will be 35 weeks pregnant. We have already put a down payment on our beach house and I won’t be far from home. Should I be okay?

Also - I plan on bringing my hospital bag, will have my sister there with me and know where the nearest hospital is.

*baby’s father does not attend this vacation*

LASTLY: What exactly does it mean if my doctor does not “OK it” ???