get a killstreak with one of those package markers.
.find something to climb on.
.beforeyou press X cook your care package. as soon as you press X, press l2 for a stun. Before letting it go press the right arrow until it says care package on the bottom of your screen. then let go of the stun and the care package. Then you have unlimited care packages.
Method 2:
Get a care package.
.Go up to a place that says that you can climb up. Before pressing X you have to cook your care package. Keep it held down, then as soon as you press X, start planting your insertion. But when you press X you still must have your package cooked.
Then as your insertion is being planted, press the right arrow to switch to the care package. if you did it right you would have a package in your hand after planting the insertion. then throwit, use the package and you keep repeating that to get unlimted care packages.