Town Square is a beautiful outdoor shopping center right at the tail end of the strip. There is tons of parking, even with all the tourists, & tons of stores to wander in & out of. There are lots of restaurants, a theater, bars for happy hour, and even a nice area where you can sit & take a break with your family. It's also really pretty during Holidays as they always decorate and have cool special events.
Personally, I love the Whole Foods at Town Square. It isn't nearly as crowded as the stores in Henderson or Summerlin & it seems to be a bit bigger.
Being so close to the strip, I'm surprised it's not more touristy but there always seems to be plenty of room for everyone!