Scouting for.. Squirrels?

Yes.  It is quite easy.  Scouting for where squirrels are in the preseason is a great way to know where they are.  Here are some things to look for:

1. Nuts:  Nuts are must.  Oaks, Hickory, Beech.  Any squirrel food source (including crops like corn).  Identifying nice squirrel food also might help with finding nice deer food sources (both like acorns and corn for example).  Look also for opened nuts on the ground.
2. The squirrels themselves. 
3. Look for the nests.  They look like big balls of branches in a tree.  Squirrels also use hollow parts in a tree for nests.  

Knowing where squirrel habitat is and how much of it there is can help a lot in wildlife management.  You know a rough population of squirrels and can know how many to harvest in the future.