I'm not doing this bingo, but I've seen others fill the "read on a boat, in a tent or in a cabin" category with audiobooks they listened to in the car, or some other creative alternative. Might that work? You're soooo close to completing -- it would be a shame for you to abandon this just for the sake of a literal interpretation of categories not suited to your life. (Again, not my rules to make, just thinking out loud ...)

Maybe...