Last year, when a group of us made the trip to Sproat Lake to see the Martin Mars one last time at their home base, we did get lucky and saw Hawaii Mars fly. While we were on the ground (or the water), some others were up above us ready to get some air-to-air shots of this mighty aircraft. They were using a Shorts Skyvan as their photo platform because it provides a good rear ramp from which to get some great shots.
Once the Mars was airborne, it headed off to do some local flying. Meanwhile, we saw the Skyvan off in the distance as it flew around awaiting the Mars to join up. Sadly, the Skyvan never came too close to us. My only shots of it were from afar. I think it is the same airframe that the group had used for the show at Abbotsford in the preceding days.