Any guesses as to what might be flying, or does it depend on servicability and all that??

It all depends on serviceability and the weather as you have suggested. You would think that at the very least the Harvard would go up. The last I heard the Spit was waiting for a magneto. The Mustang would be a candidate as well, as would the classics. The Hurricane Mk IV is tucked away in the back corner of the hanger. The prop is not yet installed, so it is unlikely to see the sunlight yet, but I could be wrong.

Any idea what the plans are for Canada Day, or is it a little too soon yet? Wondering if they will be flying over to Rockcliffe to do their thing there, and then back over to Gatineau.

That is more than likely what they are planning. I find ground to air photos very difficult to get a Rockcliffe, so if I would suggest go the the CAvM early in the morning to get your static pics of what ever they drag outside, then head over to Gatineau for the flying activities. I will of course provide more details closer to the date.

Mike