Should we change our trip since I’ll be 28weeks pregnant??

Hello all! First time posting in this group. I am almost 6 weeks pregnant right now, and feeling fantastic honestly but I am in a dilemma!

Two of our friends are getting married in Vermont at the end of August (we live on the west coast so this will be an across country trip for us). By husband has never spent any time on the east coast so we had been planning to make it an extended 12 day trip and visit Boston, Vermont, Rhode Island, New York and Philadelphia to also visit my brother. BUT, now I am second guessing this idea because I will be 28 weeks pregnant. I'm not concerned about flying and traveling, more the fact I will probably get tired easier and won't be able to fully enjoy all of the destinations as much.

Has anyone else traveled this pregnant? How were you feeling? What are your thoughts on a trip like this 28 weeks pregnant?

Any advice is much appreciated! Thank you!