this is a problem for me, too, and often they are down or up stairs in a restaurant. I've taken to wearing Depends several times. You would be better off with a smaller group excursion where they can sometimes help more than a big bus tour, as European buses do not have restrooms. in Hamburg once they made me pay to use a public restroom, down many stairs, and i did not have any euros. She finally took $1 from me, and let me sneak in. One place a group of women ended up breaking the door to a toilet place because no one had the required money to go thru the turnstile/door.