For pocket sized hidden launches you need a pocket sized hidden launchpad. The Off-World Logistics and Surveillance(OWLS) covert launch site is a high-efficiency, low-impact satellite delivery system that folds up neatly to look like the surrounding rock formations. It has 76 pieces and is meant to cost just under $10 US. Set has: Base, Minifig, rocket, satellite, pistol, remote control terminal.
The OWLS are meant to be a neutral faction in the galaxy squad theme. They do spy business for both sides, but stay out of the way when the fighting starts.