if you want to go on a trip with your chick then do it, but don't expect a group of your single friends to want to come along with you.
i hate riding with 90+% of girls because they can't keep up and they fuck up the whole flow of the day. you'll be clinging to her, taking the slow, low angle shit to get down, and all around not riding with the boys/slowing the whole group down.
as for wanting to bring your chick on a 'guys trip', well that's just straight up douchebaggery. sounds like you like spending time with her - that's great, good for you and your relationship. it also sounds like you can't spend 4 days without her - very not good for your relationship
"i'm not going unless i can bring her with" - you are a complete fucking pussy and should surrender your testicles immediately.