What can I do for my daughter while we are out?

Needing some guidance. Potty training is in full swing and my kiddo is in full big girl underwear. Doing well down to very very few accidents a day. We’re taking her to the aquarium for her birthday tmr. What do I do? She’s never used the big potty over the little one and I don’t see carrying her travel potty around being a realistic option at all, what would you do? Thanks!!!