OP...glad to hear that you're safe and I hope you get everything working again soon.
Just thinking here...but aren't we being a bit too concerned about shutting the cruise control off? My understanding of the physics of the situation is that you want to stomp on the gas ASAP. If the cruise control is engaged when you do that, so what? You want to create that extra forward force immediately to help offset the side pull of the blow-out. Once you've regained the control of the RV, you begin to back off the gas. THAT would be the time you can start worrying about the cruise control. Either a tap of the brake pedal (just enough to turn on the brake-lights, you don't have to engage the brakes) or the switch on the steering wheel.
While I'm sure a blow-out is a nerve-racking experience, and the natural tendency for an operator is to step on the brakes when something happens to our vehicle. I HOPE I've impressed upon my brain the need to jump on the gas instead, should I ever have a front tire blow out, but who knows? I also HOPE I'll never have to find out.
I am thinking about adding in a steering stabilizer one of these days. I think about it more every time I read a blow out post. Then I forget!
:S
~Rick