Do they have a lot of 4wheeler trails and mud and do you have to wear helmets

Yes!

There is a ton of trails 4 Wheeler dirt bike side-by-side whatever and you're supposed to wear a helmet but I never do once you sign that waiver you come in you're on your own

Yes they have tons of trails most of them are 4wheeler and dirt bike trails I think they only have like 4 that are just dirt bike and yes depending on the weather from the week prior depends on the mud and yes they require helmets

Yes and yes