I have the Kool Stop bead jack - purchased after fighting with a set of Continental GP 5000 TL's. It works great.

On the "what to do on the side of the road" topic, carrying the bead jack is certainly an option. I found that these tires loosened up a bit after the initial mounting, and that subsequent removal/remounting didn't require anything other than normal tire levers. It's also worth noting that I rode those tires until the tread wore out without ever getting a single roadside flat.

That said, I avoided the TL's moving forward. I have found the newer GP 5000 S TR to be much easier to mount.