I'm going to try to be there. I'm in the Hemet area for now but I went to EHS. As far as I know, most of the IE is virgin territory. There was the one guy who was detained for a while at the Murrieta Walmart, but the details were sketchy at best and the guy involved was never identified.
I went to a meet up in old town Temecula. I don't remember if it was RSD or CHP, but units pass through there about every 30 minutes on weekends and we weren't stopped or anything. I don't UOC where I live because of too many school zone issues and I don't know them all well enough, but I have wondered about the various PD's around here. My gut feeling is they wouldn't make a big deal out of it. Keep a few flyers handy and next time you see a couple units huddled together go ask.