Perhaps we can use wild but definitely not reckless as you don't want your business branding to be considered reckless. Wild, on the other hand, sounds more natural, green, or even organic.
You mention your truck which sounds iconic. However, if you sell it or it no longer runs, that piece of your farm name is gone and new clients won't understand the connection.
You don't say whether your worms are for fishing bait or to create compost from the casings. If you plan to do both that opens up more opportunities for names. If it is for fishing bait, you can use words related to fishing. Bait, wiggler, wrigglers, etc.
If it is for soil enhancement, then words like organic, natural, nature, etc.
Here are a few. Ruby's Wrigglers, Green Valley Natural Vermi Compost, Red Wigglers, Bait master, Fisherman's friend.
Use the name generator in the article and put in either composting and garden terms or fishing words. Don't forget you can also use the Latin name for worms, Lumbricina in a name.