Hi Shades.
The rule is simple; Eat before you're hungry & drink before you're thirsty.
The trickier thing is how to achieve that!
60 miles per day is a nice distance. Many here will do 40 miles on a good brekky and water.
First, get a good brekky. Slowly digested long energy release stuff is good, Porridge, Full English, Muesli and toast, whatever works for you as long as it's not just cornflakes and sugar.
On the road I nibble jelly babies just for a sugar top-up, easy to eat.
Drink can be water, squash, 50/50 fruit-juice and water mix +/- a spoonful of honey.
Stop after 20 to 25 miles for a bit of cake/oat-bar/malt-loaf, (OK a Mars bar if you wish)just 5 mins, not more. Repeat as required. Sometimes something salty like nuts or crisps help.
On say a 100 miler if I'm in no rush I'll have a burger for lunch and a pint of fully leaded coke.
Really there are no real rights and wrongs, just keep a steady input of slow-release foods and listen to your body.
Recovery wise milk, chocolate milk or milkshake is hard to beat within 30 mins of finishing.
Otherwise have a decent slow release meal, not hammer down the sugar.
Plain-enough?