This doesn't have to do with vacationing, but just in general a way I control the urge to spend. If I find myself REALLY wanting to buy something - drooling over catalogs, perusing eBay/etsy, checking the bank account 12 times just in case extra money should magically appear in it, lol - instead I go "play with" the things I already have. I collect dolls, so I will literally go play with the ones I have instead of buying something new for them. But I think you can apply this to any hobby or interest. If you are jonesing for new clothes (not needing anything, just wanting) just spend some time going through your closet - you'll probably find things in there you forgot you had, so they'll be almost like new.

Last fall I kept saying I wanted new brown boots because mine were so worn looking. I was having trouble finding any that I liked, and just so happened that the heel broke on one of my old ones. So I took them in to get the heels fixed; the guy asked me if I wanted them shined too, so I said sure. When I picked them up the next day I swear they looked like new boots. (I'd tried to shine them myself but I guess shoe shining is not my calling because I could never make much improvement to them.) So now I am perfectly happy with my 8-year-old boots and have no desire to buy new ones. I think I spent less than $20 for the new heels & shine and now I will get many more years of wear out of these.
That's just one example but I think you get the point. Try to enjoy what you have instead of always wanting more.