First night of the hiking trip they stay in dark-colored tents of varying sizes, then the next night they are all staying in small white tents with blue rain flys. The dark ones reappear during the last tent sequence.
When Austin and George are the only two left in the hot spring, Austin comments on what is either a full moon or a waxing crescent moon just over the eastern horizon at dawn (they are in the Northern Hemisphere). Neither phase would be in this position. A moon near full would be setting on the western horizon at dawn, opposite the sun, while a waxing crescent moon would not rise until after the sun and would be most visible shortly after sunset.