My American husband also moved here with me last month as a visitor. I was freaked out, anticipating the worst. The immigration officer at the border looked at our paperwork in process and gave him a 12 month visitor visa, attached in his passport. It was a smooth process-they didn't even open up our U-haul, but we did have a very detailed, itemized list with pictures of the contents of each itemized tote that we had packed. They seem to take the dual intent for granted, and did not even have to mention that was the reason we were using to move here. My husband does not have a job (can not, per immigration guidelines) and that was no problem. They did not even ask if i had a job to support him. You should be fine crossing into Canada. I've heard they use their discretion and sometimes give 6 months or 12. you can extend it by 6 months from what I understand, if the process is not complete by the deadline of the visitor visa.
