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Coyotes are attracted to dog scent and vice versa.
If you want to spice up your local coyote latrine for camera trapping a little anal scent from the pooch works nicely as a lure.
Your vet will evacuate your dog's glands using a paper towel, or you can just ask him to save a few samples for you from his patients.
Dog anal scent is a complex mixture of compounds of differing volatility, so don't leave the paper towel on the workbench or under the car seat.
Better to store it in a way that preserves the compounds.
Discard the unstained portion of the towel and save the smudged portion in ethyl alcohol.
You may also freeze it out of doors, for example in a zip lock bag in the garden shed.
For the sake of marital harmony I do not recommend storing it in the freezer.
Your wife will find it no matter how well you hide it, and even after you recover you may never be fit for camera trapping again.