Of course it's never one thing. The mechanic also felt an odd noise/resistance from the rear end -- no jokes here, this is a technical term -- and was going to investigate that.
Assuming reasonableness, also an oil change.
The Gods of Entropy do enjoy themselves.
UPDATE: Almost an hour later. AC recharged, coolant topped off. May have to get transfer case looked at "some day". But as Aragorn says, Today is not that day.