A different Twist on the $X for groceries question

As the title suggests I have a different twist on the frequent groceries question.

I am going on a self supported bike ride from Portland to Boston and my food budget is about ~$15-20 a day. Do you guys have suggestions about high calorie, minimal cooking Ideas?

I should run into a grocery store every day or two. Three at the most.

The main issues:

• I will have a camp stove that can do little more than boil some water (and not for super long), so major cooking is out.

• I can't carry too much food at once due to weight and storage limitations.

• I will be biking between 70-120 miles a day which has substantial Calorie Burn (3500-5000 a day) beyond what is burned up normally. I will need high calorie food that also has a decent amount of salt (not enough electrolytes can cause me to pass out and possibly coma, which is no good) and protein. As well as standard nutritional stuff