Yes, I've been to Vientiane lately. Yes, the need to print something when I'm traveling around does arise sometimes. I've never had a problem getting it done - anywhere - and if those temperatures in Vientiane (and also in Thailand) bothered me to the extent that I couldn't walk around outside, I wouldn't have moved to the tropics.
I believe in being prepared, but each to their own, you did get away with it after all.