Bad Gas I should of known better!

I'm sorry to hear about the health issues but it just goes to show how situations can change at any point in time. You didn't mention if you used any fuel stabilizer when you first parked your coach. Like you, I love the GM 8.1L engine and after 90,000 miles I find it a pretty bullet proof engine with minimal amount of care necessary. The fact that the engine ran at all with two year old gas is pretty impressive. Glad everything worked out OK with running a few cans of Seafoam through the system. I also would forget about the spark plugs if it is running smooth.
Be sure to check all over the coach for any possible rodent damage that may have occurred during the time it was setting. It's good to hear that you are back on the road.