Excellent advice Indy! I was gonna add something... but ya covered it all!

Hydration, calling AND pointing out hazards, salt intake and plenty of electrolyte sport drink...

the only other thing I can add is ride at YOUR pace... a lot of people get all excited and push out hard for the first 30 miles... and pay for it the last 30. Pace yourself and ride your own ride...

PLEASE report in and share pics of your success afterward too OK? I'd love to celebrate with you!