If you want to sneak into an enemy base, use a vehicle controlled by the enemy, moveincargo you dudes, make the driver captive, and make a mapsingleclique, so you can control the driver...
That way you can have him drive where you want, and you can jump out when you get there(You might wanna get in the back of a 5t...Remember to fill all three front seats...
Even humanplayers wont notice, unless they look inside(A realistic feature)...