Why this matters
The Lower Laguna Madre is broad and shallow, with channels, flats, wind and commercial traffic that are not obvious from a vacation map. A boat rental is a navigation responsibility, not only an equipment transaction.
What to compare
Confirm operator and boater-education requirements, capacity, safety equipment, chart or GPS, fuel, fishing permissions, tow policy, weather cancellation and geographic boundaries.
What changes
Wind can build short steep chop, water depth changes across flats, and storms can remove the margin for an inexperienced crew. Phone coverage is not a rescue plan.
Make the next decision
Take the briefing seriously, file a float plan, stay within marked and permitted water, keep every passenger's life jacket accessible and return before conditions or daylight narrow the options.
Current source
Use TPWD boating laws for the current operational detail. Check its date, location and scope before allowing a price, time, rule, forecast or availability statement to control the trip.