Football legend Rosey Grier was present, and working as a bodyguard the night RFK was shot. Grier was also a family friend.
IIRC Rafer Johnson was there as well.
One of the sad consequences of the RFK assassination, is it cleared the way for the Radical Leftists to take over the Democratic Party.
At the time, I considered RFK to be a radical leftist. I was dismayed when President Johnson announced on March 31 that he would not be running for re-election because I thought he was handing the Democrat Party over to the radicals. That afternoon, I declared myself a Republican, but I didn't think the Republicans would win the presidency because they had been trounced in the two previous presidential elections.
After LBJ dropped out, I was hoping that Indiana governor Roger Branigin's favorite son campaign for the White House would catch fire, but RFK beat him in the Indiana primary. So from then on, I supported Nixon.