Can I still do the quest "no, not much" if i killed some people in fallout new vegas?

so, i started this quest and for camp golf i had to do flags of our foul ups. but i accidentally made jack, the drug guy, attack me, and boone killed him, and i failed it, my question is can i still get the srg. McCredie to give bitter springs troops, or have i failed the quest, it doesnt say i failed, so i figured that there is a way...