Sheesh. Makes me second guess on taking mine on a 15 hour round road trip. =/
The good news this time was I was in the city; parents live 10-15 min. away, just use an expressway to get there. Bad news about last time, was on the way back from a wedding using back roads; 90 minutes from the closest auto parts place. Good thing I could call them up to see if they had the idler pulley, and the parents picked it up on their way out to me, 3 minutes before they closed.
OT: Replaced the water pump last night. If you take off the alternator (2 bolts and the electrical connection bolt), getting the old pump out is REALLY EASY! All the videos never mentioned it, said there would be enough room by just unbolting the pump and wiggiling it... there's not.
Will replace t-stat tonight. Didn't last night as the front skid plate was a PITA to get off (front bolts hard to get to), and it's right below access to the t-stat.
Hopefully no more overheating, although before the other night, it ran perfectly fine too, so who knows. The pump didn't have any play in it, but the seals we're probably gone. Hate to think I switched it out for no reason; although it's the original pump and I have 144k miles on it.