Don't be calling an "auto tow co" but rather a Truck repair facility!!! I 've done this in the past and have had the truck arrive in less then 15 minutes. Find one which sells truck tires as well as providing road side assistance and towing and they will get it all done quickly and professionally.
Why are you making this so hard? Canceling a trip because camping world won't respond until monday makes no sense. Find a local truck facility; get the tire issue resolved, get on with your trip and when you get back, find another roadside assistance plan
As in previous comment, I must be missing something as well.