Rayra I'm not going to get into a major discussion here, its a waste of time trying to explain any thing to you.
Fact, people die every year from CO poisoning from poorly maintained or vented propane heaters.
Fact, these heaters all state: DO NOT OPERATE WHILE SLEEPING
Fact, the OP has an infant, particularly susceptible to CO poisoning
Fact, the OP wants a CO safe option
Fact, the OP has the ability to plug the vehicle into 120volt outlet
Fact, an electric space heater meets his needs
Fact, a propane catalytic does not.
People also die from electrocution, electrical fires, vehicle rollovers (tall off road trucks with high COG), falling, riding bicycles, etc.
Better not do any activity with a remote chance of death.