Long distance car travel with puppy, tips please

[Asinine]

We've got a lab puppy, 10 weeks, and need to travel a 5 hour journey to visit family in the country in a few weeks' time. Once we get there he'll have a great time and it will be a chance to socialise him to other dogs, livestock, wild animals etc.

I'm anxious about the journey, particularly when to feed him, how to know when to stop. He is crate trained and fairly calm in the car for short journeys. We want to leave in the evening and arrive late at night.

Please give me your travel tips, even 'obvious' ones, as we're new to dog ownership.

Thanks in advance

We find with our dog that, once we're out of the bit nearby where there's interesting things to look out of the window at - he zonks out and goes to sleep anyway. We used to use that to pace out when we stopped by when the ears reappeared in the rear view mirror. Travelling at night especially we often didn't hear a peep out of him when we got on the motorway at a relative constant speed.

We take a water bowl and just fill an empty drinks bottle with water and give him a drinking opportunity at each stop (you can get the travel water bottles and attached bowl things - but they leak like buggery) - tending to do about an hour and a half at a go (but he's older), take him for a walk around at the services on whatever grass verge we can find - tend to find he won't do a poo because of how many people are coming and going but will do his usual trying to pee up any lampost going.

The other one we did so we weren't lugging massive bags of dog food around was to measure out each meal and bag it up in sandwich bags and just take the appropriate number of bags with us. Took the cushion part of his bed so he had somewhere familiar to sleep - he's not crate trained but we're considering a collapsable one as a kennel upstairs so he has somewhere consistent if we go away in future.

Thank you empty shell, I hope our puppy travels as well as your dog!