I really don't like parties where everyones drunk anymore MJ so I empathise - I usually get out of there as quick as I can....I'm not scared or tempted, it just bores me.
If it's at your house you should be able to get away and hang with the kids or something like you said - you can shoo the revellers out if they're too over the top too, can't you?
I hope it won't be as bad a drinkfest as you're fearing, but whatever happens I know you'll be fine
D