Many women do manipulate their menstural cycle to avoid getting their period during special occassions. You should check with your doctor before doing so, and only do so if you are on a low hormone pill.
Your best option is to simply skip the week off pills and continue on to a new pack with active pills (again this is really only recommended if you are on a low hormone pill). This way you would avoid your period during your vacation and basically not have a period for 6 weeks. When you do finally have your period it may be a bit heavier than usual.
A few good websites to check out for additional information are:
http://www.noperiod.com/
http://www.plannedparenthood.org/pp2/portal/files/portal/
http://www.mayoclinic.com/health/birth-control-pill/WO00098medicalinfo/birthcontrol/pub-contraception-pill.xml
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