In a large pot, cook bacon until crispy. Remove and set aside, leaving the fat in the pot.
Sauté onion in bacon fat until translucent.
Add potatoes, corn, chicken broth, and thyme. Bring to a boil, then simmer for 15-20 minutes until potatoes are tender.
In a separate bowl, whisk together evaporated milk and flour until smooth.
Stir milk mixture into the pot and simmer for 5 more minutes until thickened.
Season with salt and pepper to taste.
Chill and pour into covered bowl and refrigerate. Pack in cooler.
Set up a Dutch oven or cast iron pot over the campfire and heat until desired temperature.