Good tips here - OH YES ladies, it truly is a WONDERFUL show. The World's LARGEST ... and also the largest convention of any type held in Houston. If you haven't been before, you have just GOT TO GO !!!
My quilt group has gone since 1990 I think, we are just a short drive from Houston.
Bring snacks & water, the food court is pretty good in choices and the lines aren't too long. Time your lunches earlier at 11 or later 1-2 to avoid the main crowd. Upstairs there are more restrooms and Starbucks coffee & snacks etc and good places to sit and REST. Nice observation decks to sit out & enjoy the skyline views.
Also recommend using the PACKAGE check, it's only $1 and oh SO worth it !!
Lots of good restaurants nearby in mid-town, less pricey than downtown. The shop tours are great fun too, if you'd like to see more of Houston while you're here !!