Agree not much to optimize your savings approach over such a short period. I'd probably just focus on optimizing the trip cost, which could easily be worth much more. Get all the discounts you can.
How would you pay for it if you didn't specifically save for it (i.e. instead invested in riskier or longer-term than cash or mortgage paydown)?
Do use CC's and take reward and pay off.
Just make sure your are maximizing 401k, IRA, etc, which are, annually, use it or lose it benefit.