If you want to have a quick bite with less preparation, we can say, bagel and cream cheese are the best option for us.
Bagel for me is heavier than just slices of bread. Grabbing these in the morning reminds me of our road trips. My son loves them too! I am a fan of cream cheese so this is our favorite especially with blue berry and whole wheat bagel, Yum!
In hotels, I always pick these over any other breakfast meal. Put them in the toaster and spread some cream cheese. I am happy with a glass of juice and yogurt too. I usually grab some fruits like bananas and apples for the road. My daughter always asks for oatmeal or cereal while my son eats bagels and cereal. He is a big eater. Blame it on growth spurt! :)
Anyway, take care everyone and happy eating!