Here is the situation.
Sounds like your "friend" is being a princess/diva. I would just pretend that nothing happened when you see her this weekend and don't take any bait if she tries to be passive aggressive/make comments about it. When she doens't get the attention she wants from it she'll hopefully move on to another topic. I have asked about carpooling with friends, but if there are ever any schedule conflicts I just drive myself or have the other person drive themselves, no harm no foul.
She should have said, ' you know what I have to leave early, so why don't you guys drive on your own'. You wanting to stay later and take your time leaving is not something she should be offended by. She should be more understanding. Depending on what type of person she is though, things might become uncomfortable when all of you end up at the cabin. Unless of course she's someone who won't mind and make things 'akward'! On that note SHE'S being rude! ;-)