The tents are marked on your mini-map. Go from the right side, clearing all the tents. There is a bar at the bottom-right corner of the screen that will fill up as you destroy the equipment inside the tents. Fill it completely to complete this part of the mission.
You will find at least two explosives inside the tents. Blow them up to destroy the lab equipment. Once destroyed, the white tent icon on your mini-map will disappear. This confirms that you've successfully destroyed the equipment inside the tent.
If you don't see any flammable containers inside the tents, use your own explosives like grenades or sticky bombs.
Once destroyed, you need to enter any of the hippy vans at the site. There are multiple vans to choose from, it doesn't matter which one.
When you enter a van, the location of the three delivery vans will be marked on your mini-map.
Drive to these delivery vans and destroy them. Note that you can also change your vehicle if you'd like. We only need to get into the hippy van to mark the delivery vans. Once marked, you can change your vehicle.
After destroying the delivery vans, you will be tasked to go to the infamous Altruist Camp to destroy three more delivery vans.
Get to the camp, and be careful, as it is also heavily guarded by the hippies. Eliminate the hippies, and destroy their vans.
There are three vans in total. One is to your right as soon as you enter through the main camp gate.
One is on an elevated platform further ahead by the water tank tower.
And the last one is deep into the camp, directly in front of the wide chimney sticking out of the building at the end.
Once you've destroyed the last delivery van, an attack chopper will spawn. Take it out.
Once the chopper is down, leave the camp to complete the mission. It is better to avoid leaving through the main gate. Simply use the mountainside to leave the area.
With the hippy operation in disarray, you're one step closer to the finale of The First Dose. Next up is Off the Rails.