My side by side has bench seating with three seat belts. Can my wife and son ride with me and will we have to have helmets?

Only 4 wheelers and dirt bikes require helmets

Yes you need helmets we was there the 17.18.19 of Sept and everyone that does the trails has to have a helmet

Yes they can ride with you as long as you have belts and as long as it has a roll bar cage no you won't need helmets but to me always safety first especially with children