Make sure to bring an updated letter of intent to marry as well, plus a letter from his employer, his taxes for last year, pay stub, and bank statement. They can basically ask you to produce just about anything.
On the DS forms, bring the DS-156 (bar code on the document) and DS-160 CONFIRMATION (bar code on the document). The consular in Montreal had computers to be able to fill in the forms, however, the DS-160 they can not print as they will not take the liability of the confidential nature of this form getting into the wrong hands.
The interview part was actually enjoyable, the pre-interview, where they evaluate that all of your documentation is intact, was extremely stressful as I used an American lawyer that didn't do a good job.
Best of luck and just remember, you are closer to the end, than the beginning.
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