I have an active bowel, and I'm concerned about traveling on buses without toilets or being in other places where a bathroom might not be readily available. This is not debilitating, but I am cautious. I asked my wife how long of an airline flight she would be willing to take if she knew that a toilet would not be available for #2. I said two hours. She said twenty-four!!

My answer seems fairly reasonable, but she thought this was a real problem. What about you? How long of a flight or a bus ride would you take without the availability of a crapper?