A great post. I envy your travels.
As a Texan, I have always found the Presidio La Bahia, outside Goliad, to be even more moving than the Alamo.
The Presido at Goliad gives me a creepy feeling, even the chapel, but I like the Mission Espíritu Santo. We were there at a weekend event a few months ago; saw some period black powder weapons and a knapper and his son from Victoria making arrowheads.