[SoF Sniper]

i am making a map that has roads and i would like to have enemy trucks that drive on them...

my question is, is it possible to have an enemy truck drive down the road and if it spots you race to a destination and alert enemy troups to where you were seen, but if you hide from the truck, it wont see you and just drive by?

also, is it possible to have a small group of enemy soldiers that if you dont execute destroying a communication tower before you assault the small camp, they could call reinforcements, but if you did destroy it, no reinforcements would come?

i would appriciate any help on this, i know i am asking alot of questions and am sorry if i seem anoying... but, thanks to those who have and can help me!!!