EP1 - I went to finish "Illegal Weapons" side mission, than, on my way back, I decided to eliminate roadblock. I've parked pickup behind hill and went on killing spree. After I got back, pickup was gone - I could see it being parked on original spot.

EP2 - There is in which team is inserted via boat and has to do some damage to draw enemy units from north, in order to enable other team to free someone. IIRC Ive entered AO from SE - N-NW there is halo( which is unoperational, which is odd ), W-NW, there is small camp, with 2 quads, 2 MRAPs and truck.
I moved on the small camp, packed all gear( rockets, launchers, ammo and grenades ) into MRAP and drove along the road to engage halo site. I've parked MRAP next to road, just south line of defense of halo site. Ive killed everyone there, set charges, blew them up. Along demolition, I fired couple missles to destroy remaining vehicles in small camp. Now I turned back in order to board my MRAP, its gone.