Hi M.:
At this stage of the game, your son simply wants that bottle at night,as a soother.It pacifies him.I always thought (cold turkey) was a dramtic way to cut a toddler off.He only knows,that what he has come to find comforting,has been eliminated(taken from him) I'd think,that because he will most likely be staying with you,in your room on vacation,that he may be satisfied that your there to soothe him to sleep.So he may be alright. What I'd do, is use the next few weeks,to try and wean him off.I'd make a big deal,out of sitting with him (sharing a cup of milk before bedtime.) Him with his cup and you with yours.I'd emphasize that this is how big boys drink their milk before bed.You will no doubt have some sleepless nights. Make sure he has something to replace the bottle. A favorite blanket or stuffed animal. If your going on vacation,its to relax and enjoy yourself.Nobody should be expected to attempt weaning a child,during A vacation. If he isn't weaned by then,take and hide one bottle somewhere in your luggage.Better to save your sanity,and everyone's vacation time,than to make this a bigger issue than it is.Have a wonderful time. J. M