My kids got CapriSuns last night at one house. Also, they got a full size candy bar at one house with a very long driveway.
I gave out treat bags with fullsize candy bars, McD's coupons, and dumdums. Next year, I may just give out fullsize candy bars.
My son's children's gym had coupons that they were encouraging people to give out at Halloween for two free classes. They wanted people to put their name on the back and hand them out with treats during T or T. If anyone that got the coupon registered for classes (paid), then you would get $5 off your child's class. I thought it was an interesting idea, but a bit tacky.