At 09:46 as the group walk along the path Irving is seen carrying a book, however they don't collect the book until they reach Scissor Cave and see the book (11:29).
When the 'Welcome' video starts playing after Mark grabs the controller to start the video the controller is visible above the player stack under the TV throughout the video. The controller is still in his hand after the video ended so they possibly should have removed the controller after he picked it up.
The night in the tents would be the Innies' first experience of falling asleep, yet none of them find it at all unusual. It would be for them similar to being deactivated to allow their Outies to return, yet none of them wonder if this had happened.