You could check out a guy local to me, John Wellsford. his designs are Kiwi, not Texan, but he likes a flat bottom (on a boat) and the web is free. His site seems to be WWW.baysidewoodenboats.com.au (strange, he's a Kiwi.) Another site to check is WWW.woodenboat.net.nz 'Designs Welsford' comes up on Google, and it seems to make no difference how many 'Ls' there are.
I've skimmed through his book, and it has much practical advise on scarfing ply, and torturing it into shape. His designs seem intended for practical people, and are not flashy.