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If you were to pick just one I'd recommend the Stayer The Distance #3.
Long distance offroad is weird, on some routes you end up on a lot trails that look a lot alike and you lose interest sooner than the same time spent on road rides. I am still trying to decide if I like these longer gravel rides. Also, it's very nice not having traffic around you, but that focus needs to shift on more attention to where you put your front wheel.
Rode London to Cambridge and back, offroad. My longest gravel ride to date, quite pleased the trails were soft and only partially destroyed my upper body.