Martini & Rossi Asti: How long can I store?

I'm getting married in Hawaii (from midwest) in July of 2009. My wedding is going to be pretty pricey so I'd like to do as much as possible soon. I need about 30 bottles for my guests (welcome bags in their rooms) and would like to buy them now since it's pretty good and pretty cheap. Would it be a bad idea to get them now and store them until then? Please answer only if you know the answer and I promise to do the same if you ask a question... =D

Keep them cool,dark and dry. No direct sunlight.
And don't move them around alot.

I don't recall if they have real cork stoppers but regardless store them on their side or slanted neck down to keep the cork/seal wet.
If you do all that,
They'll be fine.


But then again How are you going to get them to Hawaii?
Martini & Rossi isn't that expensive. Probably not worth the hassle. Get them there and then for sure no worries.