Congratulations on the OC experience. You'll find that most of the time it goes pretty much like that - a big let-down with no drama and nobody even noticing that you have a handgun strapped to your side.
I hear most Wal-Marts have done away with the Nacho Station, so you may have to adjust your trip there accordingly. However, this guide still proves invaluable to newbies. http://www.texasguntalk.com/forums/texas-concealed-handgun-chl-sponsored-double-action-chl/11548-1st-time-concealed-carry-walmart-walk.html
Just remember when transitioning from Stage 4 to Stage 5 to keep "eyes right". stay safe.