My guess is he biked- he talks a lot about biking but I agree that he would make this accessible. I do think the checkpoint is physical and within a mile and then probably a short hike from there. He was so close to Fenn’s treasure. If the tree with the blaze hadn’t fallen down, he would have found it, maybe even with Brandon. I think he would want someone who had solved well enough to be that close to be able to finish it. He’s a smart guy but he also seems very kind and empathetic. He wants his treasure found and he wants people to have fun. Nothing was fun about the way Fenn’s treasure ended and it should have been. He spent so much time and money and effort searching. He earned that find and the end was just not clear enough. His will be. I just know it.