The notion of an RCAF campaign (or three) certainly appeals to me. Over the decades, I've had the privilege of becoming acquainted with two Spitfire pilots, both of whom flew in RCAF squadrons during WWII.
One of these men was someone I met as a fellow employee in the early 80s. He was an American, from Washington state, who'd managed to join the RCAF while the BoB was in progress. He was too late for that battle, and he was never a member of an Eagle squadron, but he flew plenty of missions as an RCAF pilot, and he continued to fly Spitfires after the US became involved in the war, at which point his unit became the 308th FS/31st FG. In the spring of 1943, just days after gaining his first victory, a Bf 109, my friend was in turn shot down over North Africa. He landed in a farmer's field in Tunisia. The area was still in German hands at the time; after he was captured, he eventually ended up in Sagan. I once asked him, naturally, about The Great Escape. He said that it was strictly a "British thing," and that most of the Americans knew nothing about it. My friend also flew Mustangs in Korea, but that's another story.
The other RCAF pilot I knew was in fact a Canadian, Rod I. A. Smith. I never actually met Mr. Smith, but I spoke with him several times over the phone regarding work on one of my book projects. After all of those years, he could still speak with great authority about Merlin engines.
It's been a while since I've managed much mission-building (that, too, is another story), and I'm hoping that someone out there will be able to produce an RCAF campaign. Thanks for reading this.