Dallas traffic is bad!
You have to time it just right! Normally drive on the highways after 10am until 3pm. After that it's rush hour! Then go back out after 7pm.
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There are a lot of nice restaurants near the Grapevine outlet mall.
Are you taking kids?
http://www.sandylake.com/sandylake.html (not too far from Grapevine)
Sandy Lake has a HUGE pool!