A few bits of info from the UK. There are loads of Jeeps over here running with lift kits, so its no problem on that front. The main thing is if you have wider wheels & tyres you need them covered with extended flares/arches or whatever you guys call them over there
I would recommend purchasing anything you need for your Jeep before you leave 'cos we pay through the nose for most parts & accessories over here.
Also there are quite a few local and national clubs to look up if you fancy it, the main 2 being Jeepclub (jeepclub.co.uk) & J33p Adventure club (j33p.org).
Oh, and you'll need some cash for gas ,its about $7 a gallon
Hope this is of some help.