Divide everything into two separate one gallon freezer bags, shake it up, seal, label and put in the freeze.
To cook, take out of freezer and set on counter for about 30 minutes, then dump contents of bag into slow cooker. Cook on high for 4 hours, or low for 8 hours.
If you want, you can add 1/2 cup of chicken stock to have more sauce, but the liquid from the frozen meat and vegetables melting should give you enough liquid to work with. Every slow cooker is different, so just watch yours the first time you make it.