Sounds good to me!
Early morning starts are good, 5 or 6 am, on the sunny mornings, lovely. By 12pm I've then put in enough hours to deserve stopping for early doors. I'm lucky I have time.
I understand a hirer may want to cover as much as possible. I'd set shorter distances, as someone suggested, then your not disappointed if you get there, and it's a bonus if you get further. Be prepared to chuck a plan out the window too.
A good question, and it's interesting to hear the patterns/habits of others.