in MY OPINION.. not alot of scouting is necessary for getting some hogs.
sure, some wallows and Rooting holes help.. but if there is hogs around...
just put corn in the same place for a few days and THEY WILL BE THERE.
but you never know when, usually after dark.
if your lucky, right as the sun goes down... but still enough light to see and shoot.
i have killed some at Midnight at 100yrds + with no lights..
during a full moon and they decided to come out and eat at the right time when the moon was up at its peak