Work trip and nursing son

I have a work trip planned for mid-August and I really want to go, however, right now I have a nursing 8 month old son, who still eats at least once in the middle of the night, who is obsessed with mommy and, I have no stored breast milk as my supply is now very much regulated to what he needs. So, am I screwed?

Also, relevant fact, my husband works a lot and so I basically have put the baby down every day for the last 8 months.

I am considering weaning or at least supplementing with formula at this point. I need positive suggestions/advice for how I can make this work.