explorers, rangers, cherokees, 4 runners all go right in. they are just trying to keep out the big monster mudders trucks. (you know the f-350's on rockwells and 52 inch tires)
they let the reserves come in with hummers some time ago. and ever since then the green trail(outside easy trail) has been super open. you can fit a tank through. the inside trails are tighter and if you aren't careful, you can lose a mirror. and if you arent paying attention, you can end up on an atv trail and get yourself in a pickle. but its good fun.