Using a cntrl F search here is every mention of camping cut and pasted from the PHL book. This would cover it all.
https://tpwd.texas.gov/publications/pwdpubs/media/pwd_bk_w7000_0112a.pdfHunter Orange
• fails to visibly wear at least 400 square inches of hunter
orange material with orange headwear and at least
144 square inches appearing on both chest and back during
daylight hours at times when hunting with firearms is permitted. Exempt from these requirements are: (1) authorized
department personnel and landowner employees, (2) persons
hunting turkey or migratory game birds, (3) persons within
the enclosed passenger compartment of a motor vehicle,
(4) persons within a designated campground, designated
vehicle parking area, designated boat launching facility or
departmental check station, and (5) persons other than
hunters on COE properties.
PROHIBITED ACTS
Baiting and Trapping
• sets a trap or snare within 50 yards of a designated road or
public hunting lands boundary or within 400 yards of a
designated campsite;
Means and Methods
• possesses a loaded firearm within or on a motor vehicle
except as provided for a disabled person;
• possesses a loaded firearm within a designated campsite,
designated vehicle parking area, designated boat launching
facility or departmental check station;
• discharges a firearm, bow and arrow, or crossbow from, onto,
along, or across a designated road or designated campsite;
Dogs
• fails to keep all dogs in designated campsites confined or
leashed;
Hunting Blinds, Gear, and Equipment
• constructs or places a hunting blind, stand, tower, or
platform within 50 yards of any designated road, marked unit
boundary, or designated campsite;
Hunting Blinds, Gear, and Equipment
• constructs or places a hunting blind, stand, tower, or
platform within 50 yards of any designated road, marked unit
boundary, or designated campsite;
Camping
• camps or builds a fire anywhere other than in a designated
campsite, except on units 901, 902, 903, 904, and 905
where this restriction applies only from the day prior to the
opening of the archery deer season through the day following
the close of the general deer season;
• causes, creates, or contributes to excessive or disturbing
sounds beyond the person’s immediate campsite between
the hours of 10 p.m. and 6 a.m.;
• establishes a camp and leaves it unattended for a period of
longer than 24 hours;
• establishes a camp for more than 14 consecutive days on
the same unit of public hunting lands, or for more than
21 days in a 30-day period;
There is a whole other section on camping related to US Forest Service units I did not cut and paste.
Before buidling an open campfire you might also check the county where you are staying to see if there is a burn ban. Quite a few counties in Texas have one.
https://www.kxan.com/weather/texas-burn-bans-map/