I called around to other dealers and got much more reasonable rates $200-300 but ran into the same wait time issues. I'm definitely changing my oil and filter because I crossed 600 this weekend. Looking at the manual the only other things I can't do myself is synch the throttle bodies, and I think check/adjust the valves clearance. And, I'd bet money even the dealer quoting me $500 wouldn't do that anyway unless given a reason like an error code or if I said it was running rough.
So, plan is oil and thorough inspect on my own, talk to a 3rd party mech that I trust. Possibly take to dealer that's booking (only) two weeks out or said 3rd party mech to check throttle synch and valves.