What do you think about me not travelling with my mom?
Really? Why wouldn't you?
I'm an intelligent human being, so I have to disobey her in this part.
If you think that you will not enjoy your trip, be honest. It is okay to bail on her if you think that you won't have a good time.
Who fucking cares. I can be a bitch too.
I don't think that you would be a bitch by not wanting to go on a trip, if you don't think that you would enjoy it. Just tell her that you're not interested and see if you can stay home or travel with someone else.