Panel 4:
It was so dark, and I was so eager to get out of the car and into a nice hotel room, that I found myself looking at every shack and silo on the way in, thinking "Is that the hotel?" "Is that the hotel?" Fortunately I followed the signs, and the hotel was a big, brightly lit, unmistakable thing. Yay!
Panel 5:
I think whoever was in the room before me bought the arrowhead in the gift shop and left it on the table, forgetting to take it with them.