it opens with his pre-pandemic trip to glacier national park with jeff tweedy, the frontman of the bandacclaimed author george saunders; continues with a trip to the u.k. to visit author and farmer james rebanks; and ends with him and his wife, actress megan mullally, on a road trip across a shut-down america, hauling a 30-foot air stream trailer. >> our lives underwent a profound change, where we were able to say, let's take two months on the road, and a lot of it will involve some state parks, some national parks, some more-- some more "on-purpose hiking," which is-- i was like, "that's my new thing, on-purpose hiking." >> reporter: "on-purpose hiking," yeah. >> i've bought a couple of specialized garments. i guess i'm a hiker. >> reporter: do you have-- do you have the sticks, yet? >> no. in-- in part three of the book, a surprise character talks me into the sticks, so, soon as my knees start complaining enough, i'll come around. >> reporter: stick time. >> yeah. >> reporter: this is a pretty little spot. offerman and i did some "on- purpose hiking" near the set of an amazon miniseri