Also the risk of getting really lost would be greater at night.
Not really, folks end up getting lost because they head off in a certain blase manner by NOT concentrating on the navigation, thinking that because it is daylight and they can see where they are they going they could not possibly get lost. Night navigation forces you to actually concentrate on the navigation task at hand. There is always a GPS but thats cheating. Night navigation is slightly more challenging and is actually more fun.