I think your husband will understand why you aren't going, if that is what you choose to do. But taking your car and having the ability to leave whenver you need/want is also a good plan. I'm a caretaker as well, so for me I probably wouldnt go. I wouldnt be able to relax wondering if people needed me. But on the other hand it may be a good break/refresher before the tough stuff really hits.
I know that wasn't helpful at all. Sorry. One of the things I have been working on lately is my needs/wants. I take other into consideration, but if I needed to stay home to be close to an oso having a rough time, I'd explain to Karma that while I don't want to be in the way or intrude on his time, but this is something I need to do, and while I am sorry it changes plans (something I personaly hate so I can understand), it's what I feel I need to do and I hope he can respect that.
From whatI have heard you say of your husband, I'm pretty sure he'll be understanding.