I took my recently-bought iPad 4 abroad to Japan for the holidays.
My experience was so-so. I have the WiFi only version, so that severely limited how I was able to use it on the go. WiFi in Japan is quite hard to find, but in offline mode, I got to game and jam out to tunes on the long train rides. Ended up passing through 100 levels on Unblock Me and can beat the advanced difficulty on Cribbage Pro most of the time. lol
But in all honesty, depending on where you go, I'd say either iPad would do you well. My iPad 4 didn't feel clunky or too large at all. It was very lightweight in my backpack. The Mini would just take portability to the next level.
I don't have much to say about LTE models, because I don't use a data plan for anything else other than my prepaid phone. Good luck with your purchase!