I also ride bike, and used to bonk, but it didn't take long for my body to adapt to using fat as fuel. Half the battle was mental: accepting that I truly didn't need to eat anything; my body already had all the fuel it needed.
Then I could wake up, ride hard for hours (hilly terrain), and feel no need to eat until the afternoon.
Then I could wake up, ride hard for hours (hilly terrain), and feel no need to eat until the afternoon.