The casings are mostly for uniform sizing. If you are using a dehydrator, the trays usually have fine enough screens to dry the sticks without casings. If you plan to use your smoker, and the racks are too large, you could lay your snack sticks out on cooling racks.....the kind used for cookies.....the sticks should hold together well enough on those also without casings.
As for recipes, Hi-Mountain makes quite a variety of very tasty seasoning kits for snack sticks and jerky. Usually find them in grocery stores.
Hope this helps!....