Walk in flyfishing/galveston
A few of the places that I frequent:
North shore of Jones via the RxR tracks.
Galveston Island State Park on FM 3005 $$ 6.00
Bay side of San Louis Pass end of FM 3005
Christmas Bay south shoreline
Drum bay south shoreline
Waters vary,some are clear other not so much but you can sight cast on any of them.
Hope that helps you out.