Oh yeah. A screw up with fueling alone will do it. A screw up with pacing alone will do it. Combine the two and it's inevitable and it ain't pretty.
An extremely short course on each.
fuel: somewhere in the 250-400 cal per hour range. do lots of experimenting to find what works for you. you are not eating to replace calories burned. eat too much and you'll find yourself in pukesville.
pace: Never go anaerobic if you can help it. Restrain your enthusiasm on hills. Most of the time your pace should permit conversation with fellow riders. If you are gasping, you are riding too hard. If you are riding too hard to keep up with others, drop off the back. Finishing the ride strongly at your pace is more honorable than toughing it out and blowing up half way through your randonee and struggling to barely finish.