So I am leaving my sweet home for 2 weeks...

I am leaving for another country for two weeks and won't have an Internet access (even if I will, I will not enter my steam login and pass on those "public" computers). And here comes the question: if I win a giveaway during this period of time - is it OK if I won't be able to leave a positive or negative feedback about the key redeemability? How much time do I have to leave a feedback? (a week? 2 weeks? eternity?) before a giveaway creator makes a reroll?

Maybe it's somewhere in the FAQ but it didn't come up after my looking through it (Russian FAQ).

I also feel terrible that I will miss the summer sale (or most of it)... I was hoping for Fallout 3 and Fallout: New Vegas discount...

Sorry, guys, no giveaway this time.