TJ,
The internet shows three motels near the museum. Although this weekend when I drove thru there I only saw two. Anyway here is their contact info.
The Days Inn 903-455-9600 is on the same side of I-30 as the museum. There were two listed on the opposite side of I-30 the Economy Inn 903-455-8808 and the Motel 6 903-455-0515.
Hope this helps. See ya at the National,
Ted