I imagine that out there if I told the local police during a stop that I am moving from California and bringing all my firearms, and show them my LTC, they would be very happy. I just want to double check here to make sure.
The gun is not going to be a problem. The issue might be a DPS officer not thrilled with you stopping on the highway for a non emergency.
But then DPS, rarely drives that close to the border, they usually turn around sooner.
Anyway, I have stopped for photos and not had a problem.