I have read this thread with interest. Since I am like GLC, whatever bites will bite ME first I have always been worried about/afraid of bedbugs.
I travel a lot and so far have been very lucky.
I have also read a lot about the critters. Leaving your suitcase outside for 24 hours will not do anything for you.
However, when you are in your hotel room, keep your luggage away from the bed and away from you.
Serious infestations of bedbugs are easy to find, but light infestations are not.

The bedbugs are not attracted by your warmth, they are attracted by the carbon dioxide that you exhale. There are now "bedbug traps" that do essentially that, they release small amounts of CO2 and if there are bedbugs in the house, one or two will eventually find the trap. (they won't trap all the bugs)

I am surprised and happy to hear that there is a chemical that kills these things. Google bedbugs and discover how serious an effect they have on some people.