Go to the restricted area in Bone County. Inside you will find a Cargobob helicopter, Rhino tanks and a Patriot. If you go to the center of base you will find a steel vent on the ground. Destroy it, and you can go inside and turn off the SAM sites surrounding the base. You should now be able to fly out in the chopper. Alternately, go to KACC Military Fuels at the top of Las Venturas. You need a Patriot to do this trick. If you have done the mission for the Heist strand called Up, Up, and Away, this is the location of KACC Military Fuels. Once there, take your Patriot and drive through the front gates. No one is there, and you will not get shot. If it does not let you through, take a ramp truck and put it near the gate. Then, run up it and jump the fence. Once you are inside, get out of your vehicle, go to your left, and go inside the hangar (round building) and walk through to the other end. You will end up back outside. Once you are outside in the back of the Military Fuels area, make a right and run towards the stairs that you see. Walk up those stairs, and when you get to the top, the Cargobob will be on the heli-pad. Get in it without any stars or police after you. To make this easier, just take a plane there and parachute out. However, make sure to land on the helipad. The Cargobob Helicopter can also be found where you found the Levitation in the mission for Woozie, at the military fueling area. It not too far from the Twin Dragon Casino. You will probably need another flying vehicle to get into the fueling area.