Ha - I can imagine the looks on kids' faces if I managed to track down single-square packs of Lindt 99% dark.
That said, if you know your neighborhood's general amount of trick-or-treater traffic, consider giving out:
- Nonchokable toys (remember the kids still have younger siblings). Bonus points if they're fitness oriented. Just don't give the costumed mites some kettlebells. Save the kettlebell giveaways for the Christmas stockings! ;op
- Dark chocolate (as dark as you can find)
- Single-serve packs of trail mix, if you can find'em. (Consider Amazon or Sam's Club/Costco for this...). Have a couple of alternatives if kids with allergies show up.
- Single serve packets of almond butter (you can get these on Amazon)
Paleo-Friendly Halloween Activities and Menu Ideas:
- Bobbing for bags of sug-....errr... organic apples
- Pumpkin carving and associated pumpkin's seed-roasting
- Chili (as mentioned by Deidre) or pumpkin soup. If you do paleo baking, you could make some coconut bread or muffins to go with.
- A game of "go fish" with someone behind the silkscreen attaching Halloween tchotchkes (no candy) to the fishing line
- Card games! A good game of poker could be enjoyed by older kids (tweens and up). Offer to trade poker chips for candy at the start before the cards are even dealt.
- Offer to "buy" your kids' candy at a nickel or a dime (or whatever) per piece.
Edit to add: I saw this Candy Hierarchy on The World's Best Ever and realized that my above suggestions may put me squarely in the bottom tier... :) Shares a category with white bread, but at least "whole wheat anything" is a tier below trail mix.