Wait, are you leaving on I45 (going north or south) or 249 (I assume NW)? That will make a difference since you'll end up in very different places depending on where you stop.
Can't believe I didn't pick up on that the first time.
The closest you have to you right now is ether Gander Mnt (CHL Only) on 45 North by Spring or Shiloh's Shooting Range by Willow Brook Mall (CHL and Tactical Classes).
I will recommend Shiloh's Shooting Range there class is awesome and the people is grate!!!
Check out our website (DoubleActionCHL.com - Texas Concealed Handgun Licensing (CHL) Classes). We teach at Shiloh (near 1960 and 249), offering classes every Saturday and every 3rd Sunday. We also have a class coming up this Friday. Use promo code TexasGunTalk and your class is $112.50. We also offer discounts for veterans, seniors, firefighters, ems, and LEO (and spouses).