Hey OP, don't worry about what'll happen to your wrist afterwards, I broke mine over a year ago, for a while after I thought it would never go back to normal but now it's basically fine. It no longer twinges when I move it, so don't be worried if for a while afterwards if it doesn't feel quite right..
I had to take the 6 weeks off my part time work when I had a broken wrist, it is harder for some people, so some posters on here shouldn't be so quick to judge! Saying that though, had the riding school let me, I would have quite happily carried on horse riding at the time so it is amazing some of the things you can do (I actually broke it out riding, and had to ride back for three hours with a cack arm!)
And I think you will get a lot of sympathy from girls when ur on holiday- it will definatly give you sumthing to talk about anyway!