Just a word of warning...those 767s are just that, domestic 767s, so there will be plenty of J seats, but they won't be the intercontinental version that you may be thinking of having. So just be prepared for that (unless there's an aircraft substitution to a 763). You'll have all the other trappings of J service though, plus lounge access (if you don't already have it through status or credit card/MLL membership).

Be sure to ask about moving up when you check in. This will not be automatically processed for you. Assume your YWG-YVR-YWG segments are the ones in J/D, so they need to advise YVR of your request to ensure any open front cabin seats are assigned to you and your companion.

If you provide the actual dates of travel, someone can give you a general availability count by checking out ITN or a similar site.