I don't have any experience with your condition.
You might want to make some copies of your card. That way when you
need to skip ahead of some people in line. YOu could possibly go to
the front of the line and hand the card to the person. Rather than try to
explain your condition, it might be an easier way to handle the situation? Maybe not.
It all depends on how confortable you are explaining things to strangers, and
the card may eliminate that need.
I'm not sure how friendly everyone would be about this. If someone had
a medical problem I wouldn't see a problem with skipping to the front of the line.
I could imagine some people giving you a hard time, having copies to give to those people may help out and avoid a possible confrontation.
Some people just want to know why you want to cut, and finding out you
have a medical condition, is perfectly satisfactory reason.
I'm not sure if you are in a wheel chair or
scooter, that could be a good reason
to skip ahead and go for the wheelchair access ones? Or just flash the card
when the special access one opens up.
Of course, keep note of all the restrooms, some are just more accessible than
others. Some have more numbers of stalls, some just have more traffic.
So, keep your eyes open. I drink lots of water, and make lots of pit stops, and between myself and my husband we know where all the restrooms are.
Have a great trip.
Connie