Do you buy books while on vacation/holiday?
Do you have favorite bookstores that you only get to visit while away on a trip?
What/Where are they?
An interesting set of questions. Do I buy books while on vacation? Yes, sometimes. Usually when I run out of things to read on my trip. When that happens I'll buy wherever I can (big box stores, airport bookshops, etc). I do like to browse independent and used book stores when I happen across them while I'm on vacation, but those visits are usually spur-of-the-moment rather than planned.
That being said, one of my favorite bookstores is the Seminary Co-op in Hyde Park (home of University of Chicago, my alma mater). I'm still a member and I try to visit every time I go to Chicago.