I found a Clarence E. Walstad referenced as living in Fulton, TX, age 99 (!)
This information was from a People Search sub search---back referencing this to SSDI shows that CEW was Born: 1903 and deceased in Fulton, TX on 13JUL82.He was originally from MN.
So, as with many People Search files--this one was never updated at the time of decease--they just rolled over the name and kept adding to his age. He'd be 99 today.
Curiously there were three other Clarence's in SSDI--this one and two others from MN and a fourth from ND. There was a Clarence A also from MN, and this one we know is C'E'W, so your search field is only three individuals.
There were no other Walstad's in the Fulton, TX area, but the rest of the Walstad listings (9) for TX are in the Dallas-Ft. Worth area.A rather concentrated clan, so maybe someone there can direct you.
Fulton, TX is way down the coast, just north of Corpus Cristi, and is a northeast suburb of Rockport.Perhaps you can contact the local county library to see if they can pull the July 1982 obit for CEW and see if it mentions any military service or next-of-kin.