The last time I went to Europe, my boyfriend said ' We'll rent a whellchair to get around Paris' . Well, I started to cry. I only use a cane when my leg feels tired.
He didn't understand my reaction and I didn't understand his point of view. He knew darn well that I would see more things if I was in the chair sometimes. During the trip, I realised that he was so right. We also used that chair to carry our lunches and bottles of wine and... I did see more of Paris than I would have with just a cane.
So, really, maybe you can look at it the other way. ( that is if you want to go at all, if you simply don't want to go, than just say so, in a nice way
But if this is a chance in a lifetime, maybe there are ways to get aroung your darn bladder etc. you know Depens and Poise. Plus, look for the shade always and you may just enjoy it... this is just my point of you.
I always want to do as much as I can with what I have. Take good care . Carolew