The Raptor Center tour includes a walk of about a mile, it says over level ground. I'm wondering how strenuous this is, what is the pace of this walk? Hubby (79) is capable but fairly slow, will have a cane. We dont want to slow others, so wonder if it's a "walk a little, stop and hear information, move on some more" type of thing....or is it a start to finish hike with no interruptions? Thanks