I wasn't sure how many we'd get, but we are right up the road from an elementary school. There is a sidewalk but only on the opposite side of the street; and few streetlights; it gets DARK. We had kids from about 6pm (still light out) to about 8:30pm. I left the light on until 9pm, just in case there were any stragglers.
I had 126 'full size' candies (KitKats, Reese's, Hershey bars, Skittles (3 kinds), Starbursts (3 kinds), and M&Ms (3 kinds); plus a bag of Smarties for littles; 20 bags of chips (Rap Snacks, salt & vinegar); and 20 prepared allergy goodie bags with fingerlights, slap bracelets, and Kawaii Halloween glow in the dark squishes (and extras of all those). We ended up handing out 4 goodie bags, plus we did one fingerlight/bracelet/squish with a candy bar, and had about 70 T-o-T'ers get those; and 2 young men who were so excited about the chips, they got 2 bags each.
Only one rude parent in the bunch ("I want a candy bar; go get me one" to her daughter when the child showed her mom she got a full size candy bar; the mom was in my driveway, and I had a couple more kids at the door, so I was right there and heard her.) The girl came back and said "I want a candy for my mom"; no please or thank you either time. Kid was about 3. I was nice and did give the girl one for her mom, but it irritated me.