Hey C.,
We just got home from Galveston this past Friday. If you are staying on the seawall most everything is back up and operational. You can get some really great room rates right now because they are encouraging folks to come back. I don't know anything about Stewart beach or where that is located tho.
For a pre-holiday weekend it was not at all crowded. I was surprised about that because it seemed like a perfect time to go. The beaches/water in Galveston has never been the pretty clear blue like you see in the Carribbean but the water was clear enough for us to see a black tip shark, some sting rays, jelly fish, hermit crabs and dolphins nearby. We saw a LOT more sea life than I've ever seen there before.
We also did not go to the Strand area. I heard that a lot of those shops were still not re-opened yet. A good deal on rooms right now is at the historic Hotel Galvez. We stayed there three nights and enjoyed it. But they aren't super kid friendly even tho many families were there.
We really enjoyed our visit because it wasn't as crowded and the prices were right.
D.