Jim, wecome. I am in a similar situation, I am 53 and recently diagnosed. I have been going through some of these same exercises.
I would certainly expect your insurance to pay out in your situation. This is exactly what you have paid for, to have protection in case of conditions like this. Still you should look at the policy, check the fine print. One thing I learned is that my insurance company has the right to request an autopsy, which I'm not too happy about. On the positive side, it turns out that my policy, like many, allows for a certain amount of the value to be paid out in advance if you get a doctor's determination that you have less than a year to live. This could really help with expenses for that last year. (And you're not obligated to drop dead when 365 days are up either.) I hope your policy contains good news like that.
And congratulations on having the foresight to get coverage, a lot of guys our age don't have it. I have to admit that I only have insurance because my employer offers it automatically and pays the premiums, so it's free. I lucked out in that regard.