I grew up in Hillsville. Trick-or-treating was exciting - and exhausting. Just a few treks up long, steep driveways were enough to tire out little legs.
There are fewer trick-or-treaters in Hillsville these days. There's a newer suburb, just 10 minutes drive away, that has ideal trick-or-treating demographics: above average household incomes, children living in the neighbourhood, short driveways, little traffic, and houses built close together.
I have no idea if cross-town trick or treating is more than a marginal phenomenon, but there are on-line analyses of the best trick-or-treating spots (they mention a factor that had never occurred to me - crime). And it's true that in a quality neighbourhood a dedicated vampire or lion or ghost can score a pillowcase full of chocolate in 60 minutes flat.