In the past for camping, I've often just taken a few Weetabix (or their cheaper supermarket equivalent) and eaten them for breakfast with milk. Talking to people, it has been suggested that you can make up porridge mixtures with dried milk and various type of dried fruit, and just add water. I do prefer milk in my porridge, so this sounds like a better idea than just using water added to the oats alone.
Hunting around, I haven't managed to find much in the way of recipes for this, so I was wondering what ratios of ingredients people use. I'll probably do some experimentation anyway, but I was hoping to minimise the number of disasters!
The recipe I've seen had:
50g Porridge Oats
25g Sultanas
10g Dried Fruit
1 teaspoon milk powder
11/2 teaspoons sugar
1/8 teaspoon salt