I have the following bookmarked for a long time:
The world has really changed. Most people – specific national resources excepted – examples – just seem to go to booking.com or airb&b. Google is probably used quite a lot, too; that’s what I used before the other two.
Before that, one visited the tourist office, which was always a “procedure”
Or the good old “syndicat d’initiative” as we used to say in the 80’s.