Contrary to your convictions, and certainly not any indictment on your character, the odds are that you will forget again. It may not be on the ATV, but it will happen somehwere, sometime, and there's a chance it will happen when you could really use it.

Of far, far greater importance is the knowledge and reasoning ability you keep with you at all times. More than anything else you could stuff in a sack, down a pocket, or attach to your transport, a properly equipped mind will do far more to ensure your survival.

That said, I've tried to incorporate more kit into my "true" EDC and not separate so that I can pull such a stunt. I've learned that I can attach most of my kit in one form or another to things like key chains, necklaces, or belt pockets so that they are virtually attached to me. I don't go anywhere without equipping the basics first thing in the morning. Yes, it makes my keychain, my wallet, my id badge, my necklace a bit more bulky, but you get used to that sort of thing pretty quickly. Also, by attaching all the seldom used but essential survival gear to my daily use EDC, I am forced to pare it down to just the essentials, and have to really think of ways to make the most out of what I pack. We all suffer from the same diaschisma of believing we need to fill an absolute void before we are secure, but most of the time, much of what we need is not that far out of hand. All we lack in sufficient knowledge or cognitive ability to make the most out of our given environments. Unless you find yourself at the top of a mountain, somewhere deep in Antarctica, or lost at sea, then the provision is usually there to undo most predicaments, otherwise mankind would not have been able venture forth as we did thousands of years ago to occupy most of the land mass of this planet. All it usually takes is time and effort to figure it out. The more you can do of that beforehand, the less artifical means you will need to take with you.

The first thing you should take mentally with you is awareness. Without that, no amount or type of gear is going to save your butt. It seems to me that you had that with you, even if you had a brain fart about the gear, and that makes the biggest difference.

The DR kit is the next best thing to forced attachment. If you can make it a true EDC like your keys or your wallet, you probably won't be as likely to lose it. It will become like putting on your socks in the morning. When was the last time you lost a sock at work?