Riding your ATV is fun and you want to make sure you do it by following the rules and regulations of the National Forest Service when you're riding on their lands.
Here is an overview for riding your ATV at the De Soto National Forest where there are over 68 miles of designated ATV trails available for your ATV riding pleasure. They do ask that you wear your DOT approved helmet at all times.
At the time of this writing there is no fee and no permit required to ride on these ATV trails.
Since 1993, ATVs are not allowed to drive on any roads shared by licensed motorized vehicle traffic. Be aware of this regulation and don't go on any Forest Service Roads where regular traffic is located.
You are also prohibited from riding your ATV in the areas of campsites.
You are welcome to ride your ATV through the forest but they do ask that you stay on the designated trails and do not go "trailblazing" on your ATV, this erodes and damages the forest and that is against the Forest Service Law and will end your fun day of ATVing if you get caught doing that. Best bet: be responsible and don't do it.
The Forest Service asks that you adhere to the missives set for by Treadlightly and if you bring it in, pack it out with you and stay on the designated trails to help preserve this beautiful forest land for future generations to ride their ATVs on.
Drinking of alcoholic beverages while operating your ATV is just ignorant, but alcoholic beverages are not allowed on any National Forest Service lands and this includes campsites.