My wife and I are ATVers. We typically ride in Minnesota and Wisconsin, but occasionally into Michigan and South Dakota. I have a Garmin Zumo XT. I do have VV Maps, which work great in MN, SD and WI. I am looking for ATV trail maps that will work on my Garmin Zumo XT. I know there are Android apps, but I prefer to use my Garmin Zumo XT because it is bright and easy to read in the daylight outside.
The alternative might be to find software that will convert Android ATV trail maps so that Garmin Zumo XT can use them.