Sounds like it was a great ride and you had a lot of fun doing it. To me, the most important thing is the fun. I love my yearly MS 150 rides with the team. It's just a lot of fun on both days of the ride.
I think I would consider getting some cycling shoes for your next century. They're just so much better to ride in and they make climbing so much easier. I use SPD M520 double sided pedals and Specialized BG Sports cycling shoes. Never had a hot spot in three years of riding with them.
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HCFR Cycling Team
Ride Safe ... Ride Hard ... Ride Daily
2017 Colnago C-RS
2012 Colnago Ace
2010 Giant Cypress