Welcome back RiderDuke, we went to three wheels back in 2013 with a Triglide and just bought a 2019 Goldwing with a CSC trike kit on it last month so far we are enjoying it.
Come on down this group is not about what you ride it is more about you riding and fellowship with the rest of us, besides it's been awhile since I have seen the can am up close.
I have a vacuum made for changing oil, I used it and then put water in the tank and used my shop vac until clean, may need to add a flex hose on the vac to reach all corners.