And therein lies the contradiction in TPWD's regulations related to this. From TPWD's website under "Fishing Regulations"...
Legal Freshwater and Saltwater Devices and Restrictions for Fish
These devices, subject to restrictions listed, may be used to take fish and other aquatic life in Texas public waters.
[b]Methods and devices not listed here are not legal for use in Texas. [/b]
RC boats are not mentioned anywhere in the regulations. Only "pole and line". Perfectly legal in a private fishery but I'd check with my local Game Warden before I launched one on a public lake.
As for the arrests on the Brazos... was it because they were using an RC boat or because they were using a sportfish (rainbow trout) for bait and delivering that bait into an area below the dam that was restricted?