As far as eating every 15 minutes versus 30. I typcially don't eat that often either, but that's why I ate smaller chunks of food during RAIN. It was less food but more often. I think it helped.
Wow; a 130-mile ride a week or so before RAIN. That's more ambitious than anything I did to train for it, and I have to wonder whether a week to ten days will be enough to recover from it. Maybe I'm just slow to recover, but I will tell you that took me about two full weeks after RAIN to feel like myself again physically and mentally. If I were you, I'd either forego that ride altogether or do it at least two full weeks in advance. I truly believe that your base is more than adequate as is. But perhaps some of the ultra-distance cyclists on TE will chime in on that.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher