Just found out this type of camping has a name and want to give it a try. What sort of resources/tips do you have for dispersed camping?

Here's the best resource I've found for my area: https://www.fs.usda.gov/activity/mtnf/recreation/camping-cabins/?recid=21644&actid=34

The first question that comes to mind for me is what do you do about your car, just leave it at the trail head and hope it doesn't get towed?