Injured garter snake- a buddy of mine

[guidofatherof5]

Bringing it in is an option and also leaving it to nature. Nightcrawlers are great food and can be dug up. A water dish and paper towels with some kind of hide would work.

[MNGuy]

I think it couldn't hurt to bring it in and nurse it back to health as long as you keep it separated from any other reptiles you might own.

You could feed it worms and "cultivate" an easily accessible patch of earthworms outside by laying a big log, wide piece of wood, thick piece of wet cardboard or something like that in a shady part of your yard. Hose it down so the area is damp and leave it for awhile and worms will inevitably start gathering underneath it. All you have to do is peel it up every few days and grab the worms you see.

Good luck, and keep us posted with pictures and updates!