So this weekend, hubs tried a couple of your suggestions. He brought more with him on his ride and ate it throughout his ride and not just at the two breaks that the group takes. He likes to make himself a shake when he gets back from a ride, but it is just milk and fruit. He added two scoops of protein powder to that and at his post ride meal after that. I have to say that he was much more alert!

Thanks for all the great advice!