Who is "What If?" Who Is "On Board?"

This is Karla informing you of the correct answer to the last survey question I posted after our trip to Vermont. The answer is: Caleb is the "What If" guy and Luke is "On Board." The whole topic came up when Luke and Caleb were telling about the time when Caleb said, "What if we hike 48 straight hours?" or something crazy like that. Caleb was only joking but Luke said, "let's do it," and so they gave it a try. The boys said that happens a lot. Caleb will just throw something out there as a crazy thought and Luke is ready to turn it into a reality. Therefore, only three of you answered the question correctly. I guess that's because they both are "On Board" or they wouldn't even be doing this hike! Hopefully, the guys will update us soon on their progress. And maybe they'll post a new question for us to ponder. . .