It won't really help in time for tomorrow, but try luring her onto your hand with the treats. First one or two feet, then three, then a bit further... make her work for them a bit and eventually she should get it. You can make your hand a bridge to your leg and make her come and fetch the treat from your leg or up your arm. As her trust in you builds up, and you have her where you can reach her to pick her up, you should be able to start with the forced socialization - if you still need to, by then.