"Need" becomes a pretty subjective word in this context.
I've flown my CA-11's and CA-14's on my ten foot stand countless times. I've also taped them to pillars, stacks, walls, sconces, balconies, and coat-hangers. I've dropped them from ceilings and light fixtures and clipped them onto light pieces of old gaffers tape dangling from AC ducts. If yo don't have a stand, get clips, string, and tape and you *should* be okay. If you do have a stand, be sure that you fab. yourself sort sort of shockmount. I remember once someone posted a picture of a sock mount they made for some small CA type mics-- it consisted of two playing cards taped onto the stand projecting outward. The lightweight microphones clipped onto the playing cards. I've noticed that tons of sound transfers through my stand, so for me, employing some sort of sound absorbing device between the stand and the mics is absolutely compulsory.
What sort of event are you going to? At what type of venue?
EDIT to add: be sure to bring some extentions too-- in my experience, the 6' isn't nearly long enough for many set ups