Are you sure that he's going on a trip with this guy friends? His behavior is way over the top and uncalled for. Only someone who had been caught in a lie will act this way.
First of all, set up an account for yourself only - leave the joint account as is, but don't add any of your money to it. If you don't work and have no other means of income you still should open an account and add $100 every month into the account. This will safeguard yourself from your husband raiding the joint account.
Something is up other than the trip he has planned with his friends. Try to find out as much as you can - which airline he's flying with, where he's staying and
so forth. If you know his friends try to find out from their wives what's going on.
Regardless, his behavior seems very suspicious and uncalled for and you should be prepared for some more.