This discussions is for horror stories when traveling to/from regionals or Championships.
I'll start
Sherman set the Way-Back machine to March of 2001.
Our rookie year. Very first regional at Grand Rapids, MI (WMR). We decide to save money on a hotel by leaving for Michigan early Thursday morning. Early, as in 0400

We were running early, so we decided to stop at a Stake and Shake for breakfast. We had 20+ students and about 7 mentors. Our first clue for disaster was that they had only on cook and one waitress. It took about 3 hours for everyone to get their breakfast

and some didn't get all they ordered. When the bills came, they were for each INDIVIDUAL item ordered so you had to mix and match to get the right bills. Needless to say, we got to WMR very late and we were trying to catch up all day Thursday. It did have a happy ending though. We got rookie All-Star and came in second in the finals.
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World's - #1 seeded in Archimedes, WON Archimedes and made it to Einstein
2016 NC District - Guilford County. #13 seeded, Finalist. Won Quality award.
IN District - Tippecanoe. #4 seeded. Won Innovation in Control award.
IN District - Perry Meridian. #3 seeded. Finalist. Won Excellence in Engineering award.
IN District - State Championship. #1 seeded. Finalist. Won Excellence inn Engineering award.