According to the CO website for today, MEM is an RJ flight and arrives at TERMINAL A. Lately, my supersecret way is to exit the Turnpike at 13A and pull immediately over to the right and park. There will be several limos and other cars waiting as well. I then have my party call me after they have exited the RJ and picked up their gate checked bag on the jetway. I then proceed to Terminal A and meet them on the upstairs Departure level. Usually it is much less traffic and the PA cops aren't as likely to move you out as quick as they do on the arrivals level. If she's checking a bag, have her call you once she grabs it from baggage claim and then head into the airport.
I hate doing the terminal circle of loops around EWR.