I always have such a hard time choosing what to bring, when I'm away..
In July, I went back to Canada for 4 months, and the figuring out what to take was just awful...
I ended up bringing a whole whack of things I wanted to trade or sell (postage is cheaper there, and the postal system is more reliable in Canada, so it makes more sense to do it from there), and then ended up keeping them all and hauling them back with me, just because I didn't get around to the selling.... Next year, probably.
In addition to the 10 or so decks I wanted to get rid of, I think I brought about 15 or 20 more... but I was there for 4 months, so that less than 5 decks per month, which is perfectly reasonable, right?
I took my regular 'reading-for-the-public' decks: Soprafino, Roots of Asia, RWS, and large irridescant Illuminated.
And then some that I wanted to use in the class I was teaching... a Giant RWS, my Meneghello Visconti, a couple of Marseilles.
And then a couple I wanted to play with: Tarot of Trees, Corte dei Tarocchi, Magical Forest, Deviant Moon, Gaudais.
Of course, I didn't even get close to using everything I brought.. next year, if I do a similar trip, I'll pare it down a LOT. Last time, I had a bit of fear that it would be a one way trip, and so I thought I should take anything reeaally important, just in case.
On top of all that, I had decks that I'd left at a friend's place before I moved, (it was not possible to bring my whole collection, due to the weight restrictions for my luggage.. I moved with just 3 suitcases), and ones which I'd ordered after moving and had shipped to her (for security, and to avoid the high import taxes here), all of which I brought back with me this time. Most of my luggage was Tarot!