Ask him to stay or let him go?

My boyfriend will be leaving for Cali at the end of this month to attend his cousins wedding ceremony. I'll be 34 weeks pregnant by the time he leaves and this is our first child so I am very afraid to be alone. I do not want to be selfish and tell him he can't go though. There will be lots of drinking (his family plans to have a "bar night") He can only afford one round ticket so if an emergency were to happen he would not be able to fly back home and would have to wait for his last flight out. I know the chances of anything happening are slim but I'm super paranoid. Therefore I am seeking opinions to see if I should talk to him about my worries or just let him go and not worry about it. Also, he will be gone for 4 days. This is probably irrelevant but his family will be coming down 4 weeks after the wedding to be here for the baby.

(We are also in the process of moving and will be moved out by March 1st so I'm also stressed about that and packing)

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