If I were you I would avoid I-10 THRU Louisiana that is one bone jarring ride. If you are going to be close to Mobile Alabama on the way I would recommend Bellingrath Gardens just outside Mobile.
In Houston you might like San Jacinto Battleground and Monument, There is also the Battleship Texas at the Monument also.
There is a free ferry in Galveston you can take to Boliver Peninsula and back sometimes you see the dolphins.
If you like to Fish further down the Boliver Peninsula is Roll Over Pass some of the best bank fishing in Texas.
Also in Galveston is the Historic Strand and the tall ship Alisha.
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