Not allowing my husband to drink at his best friends wedding..

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Ok before I get called a controlling biotch.. I'm nine months pregnant. 
My husband is in a wedding party for his good buddy two days before my due date. The wedding is out of town and we also have a toddler. I would never keep him from attending the wedding as I know he could easily leave if need be and rush to get me to the hospital.. Only thing is that wouldn't be able to happen if he was drunk or drinking. Also if I was to delivery the baby and he had whiskey on his breath I could never forgive him. This has been a fight with him. He wants to be able to drink and have fun before baby turns our life upside down (in the best way). Not to mention he just spent the entire last weekend celebrating the stag! So in my opinion he's already had this "party" time. 
What do you think ladies? Am I being crazy or is asking him not to drink while I'm practically 40 weeks unreasonable? 
I should add my husband is an extremely cheap drunk. Like buzz after one beer cheap. Lol 
EDIT: My main concern is how I would get to the hospital myself. I'm not close with my family and my inlaws would have to stay with our toddler. Certainly you all who think I'm overreacting don't expect my husband to drive while he's had any alcohol or me to drive myself while in labor? Our hospital is 1.5 hours away. But thanks all for your honest opinions! Really appreciate it!