Shorts or pants while cycling is a very personal choice. Ride what YOU feel comfortable in, no matter what the designed purpose is.
For long training rides and mountain biking, I prefer good quality lycra shorts. I don't care what others think about them.
For commuting and touring, I prefer merino wool boxer briefs and quick drying, loose fitting nylon shorts since I spend lots of time off the bike through the day and walking and sitting anywhere but a bike saddle for extended periods with a sweaty, padded chamios isn't the most luxurious feeling.
Don't let the preoccupations of others decide your clothing choices, especially on a tour. You need to be comfortable above all else.
My 2c, YMMV of course.
Enjoy the ride,