Posts like these are so common which is why I carry everything required to change a tire. Every minute you spend stranded along side the highway or interstate your lives are at risk. I cannot imagine being told it will be hours until help arrives and just sitting meekly on the shoulder waiting for some fool to kill us all.
Yes I have ERS, Coachnet, which I have never needed and hope I never will but I have changed and repaired three flats and a blowout on our TT each time spending no more than 15 or 20 minutes doing so. A trip to Harbor Freight can get you everything you'll need for around $100 (100 psi compressor, jack stand, bottle jack, torque wrench and repair/plug kit). No the tools are not high end but you will have them when needed which hopefully won't be often.
Do you have a spare? When was the last time you checked it? Can you bust loose the lugs on your tires? Have you ever tried? Practice under controlled, safe non emergency conditions such as in your driveway or a parking lot some time. Knowing you can do the job safely keeps a poor ERS response from needlessly jeopardizing your lives. Like they say in the Boy Scouts.... :C