I got hold of a Texas Constitutional Carry guide done by US Law Shield. It is in PDF. Not sure how to put it up for download, but I can email it if anyone wants to see it.
Someone who is not a resident of Texas can carry.
It apparently only applies to handguns which is odd, but rifles were already allowed for open carry.
The guide says typical "no guns" type signs can be enforced as well as a new 30.05 sign. A specific 30.06 signage is the only sign that is effective for LTC holders.
There may be an issue being within 1000 feet of a school since existing law only makes an exception for LTC holders.
There is a list of 14 or so places carry is not allowed. Sucks but something that ought to be fixed. I don't remember the LTC restrictions being that long.
Schools, Polling Places, Courts, Racetracks, Secured area of airports, within 1000 feet of a place of execution, Bars (51% location), Proff sporting events, Correctional Facilities, civil commitment facilities, Hospitals/nursing homes, mental hospitals, amusement parks, room of an open meeting of a govt entity.