Since you're driving, I think this would be really nice to have in your room. I'm not sure what to tell you for out and about.
At the moment, I'm planning to bring the folding travel potty seat we just got - will use that for the parks. Though she didn't want to use it last night, Izzy happily used it tonight, so that was good!

Hoping I can get her used to it before we leave. I also may bring one like your #2 option (only ours has Minnie, of course

) and leave that in the room. We're flying, though, so it will depend if I have room in the luggage. I know she is comfortable with that seat, as she often uses it at home and when we go to the grandparents' houses. Good luck and I hope things go smoothly!