I hunt the early season with an ancient Iver Johnson scatter gun in 16 gauge. Low base # 6 does the job every time. This shotgun was my Grandad's and it's seen much use for about 100 years yet it always shoots straight.
I typically wear GI woodland camo pants. The knees and seat area have extra materiel and the large cargo pockets are great. For a shirt, I often wear plaid with large pattern. Cap is orange and I usually cover my face with a camo scarf.
Thick moccasin style slippers help me to walk quietly in the forest. I often use a Lohman "barker" call to get 'em out in the open.
After all the leaves are gone, I switch to Marlin bolt action 22 MAG with 2X - 7X scope. But because of its deadly range, I'm extra careful about safe back stop before shooting.
Squirrel hunting is great fun and wonderful meals as well!
TR