in the summer months i have seen most hogs late in the evening and at night

Hogs will lay up all day in a cool wet area then move and feed at night, if you want to increase your chances of seeing hogs late in the evening before it's gets dark, find the cool wet places where they may be bedding down during the day and bait the area with flour / corn or anything that might keep them hanging around.  try using a hog pipe and set up a trail cam to find out exactly what time they are hitting the hog pipe, if it's strictly at night then get you a Destroyer Hawg light and shoot some pork at night.