Directions to the sandy [dusty] trail
Directions to the trail I mentioned:
Take I-10 past Palm Springs, past Indio to the "29 Palms/Mecca" offramp. Remember, it took us nearly 1/2 hour of climbing that long grade before we made it to the turnoff. Exit "29 Palms/Mecca". Turn left at the stop sign, traveling north on the overpass towards Joshua Tree National Park (East Entrance). Enter the park after 8 minutes of driving (6 miles). The Ranger Station is on your left. Now, set your trip odometer. At approximately Mile 6, there will be a dirt road on your right leading to a fork in the road where you can travel to either Black Eagle Mine (far right) or Old Dale (straight ahead along dirt road). Just past this fork in the road along the route to Old Dale is the area where that couple was camping. I don't recall if they had a campfire set, but if you checked online, I'm sure there should be information about this.
I am thinking that we should meet at the Cottonwood Ranger Station. The cost for entering the park (legally) is $10 for 1 weeks worth of visits. If you are going to camp out, it is advised to pay the fee, but since you will be arriving after dark, I doubt there will be anyone at the Rangers station to collect the $$. So, if we all agree to meet at the Cottonwood Visitors Center on Saturday morning, we can just pay there.
Be sure to not say anything about 4 wheeling to the Rangers. They will ask you if you are a group, and they may sweat us for a 'Conditional Use Permit'. Just say you are hikers and backpackers and they will smile at you!
It's cool that your friend with the Montero wants to roll. Be sure your friends all have CB radios, and test them out before the trip to make sure they work.
This sounds like it's going to be a nice, big group!