Kreator, when talking to Trail Tough about my lack of locker options they mentioned lowering air pressure to 8 or 10 pounds. I would be interested in hearing what other people do. I might even jack it up, deflate, "paint" tread and lower on cardboard to see what is the best compromise. I might start at 15 or 16 lb. More experienced 4X4 people would probably think I am just being a big chicken. Maybe I am. Once I am more familiar with the 2 tracks etc where I want to go I will most likely be much braver.
Google Port Isabel, TX, slide a little east to South Padre Island and then south across the channel. That is basically known as Boca Chica Island. Switch to earth view (lower left box). scroll west from the South jetty and follow the shore line around Dolphin cove / bay and then swing to the SW along the Brownsville Ship Channel. Shortly there is the entrance to "South Bay" and the land there is called Clark Island which is where I wish to camp. Before you get all the way to south bay / Clark island there is a cut that runs inland. Border Patrol tells me that if the tide is out and there has not been much rain, I should just be able to follow / drive along the shore. Otherwise turn inland there and go around the cut. More experienced people that know where they are going and where not to just cut across "uncharted" areas but have also told "horror" stories of getting out and walking it first and thinking it would be ok only to find they were planing and needed to keep speed up to reach the other side. Next trip in about 2 weeks. Will take pictures. I intend to camp so I can drive out when the tide is out, stay and fish until it goes back out. Thanks for the feedback, Tio in Paradise on the Rio (well, the river is about 7 miles S of me and it is about 56 miiles to where the pavement ends on Boca Chica then 5 miles N to the Jetty)