If I had a "plan" like that, I would "test" it out some off-hours time by having a "tire problem" beside an old two-lane somewhere; just remove a core and let it go almost completely flat, then replace the core, then go a hundred feet or so and "land", call them and wait to see just how good the "plan" is.
Your back-up plan with the air-tank would, of course, be waiting somewhere out of sight.
Sneaky as this might seem, it is far better to know if what you paid for is worth a cent under controlled circumstances, than to find out some dark rainy night that it ain't gonna fly.
I will bet that no one ever shows, and if they do, it will probably be hours.
To be a good test, it must be several hours after they have closed and all gone home, and some considerable in-convenient distance from their nearest shop.
If some un-lucky soul does just happen to come a'runnin', let him air the tire (not telling him what you did, of course) and give him a twenty for his trouble.
Get back with us and let us know how this turns out.
Most of these so-called road-side assistance programs are nothing but a
gimmick.
I know for a fact that in my area, none of the established wrecker services will honor (that popular road-side assistance program) , as they claim to have to jump through too many hoops and almost never get their money, if ever; what they will do is get paid by the motorist and give the motorist a receipt to turn in for a re-imbursement.
I am my own road-side assistance plan.