I think if you've practiced without breakfast before, there are no reasons you should change things up now.
Now onto the food:
1. Carbs - Bake some sweet potatoes with a bit of coconut oil. If you have a food processor, you can process the baked sweet potato, add some quality apple sauce, sprinkle with cinnamon and put it in a tupperware container. Great source of starch and pretty quick supply of fuel for your muscles. If you don't have a food processor, I'd just take the sweet potatoes and put them in a ziplock bag and bring cinnamon and apple sauce with me. Then dip the sweet potatoes in apple sauce and eat it.
Bring some cucumbers - a pretty refreshing snack on a hot day.
Carrots are another great option for on the go snack.
Banana is pretty good starch too, get a nice ripe one.
- Protein - hard boil some eggs and leave the peel on, they'll keep longer than way.
You can also bring some canned fish with you. Or go to the grocery store and get some decent deli meat. You can bake, poach some chicken and bring that with you as well.
- Fat - avocados are always good. If you get some there are about to be ripe, they'll ripen up just in time.
You can also purchase some nuts, I'm not a big fan due o the O6 but better than starving.
Shredded coconut is amazing. Put it in a baggie and eat it with a spoon.
If you find a grocery store where ever you're traveling you can get some canned coconut milk and just drink it for fat.