When I was 8 years old, my parents purchased a 1963 Phoenix Travel Trailer new. We traveled all over the USA with that set up.
That trailer had the gas light you are talking about. I remember my dad replacing the mantel (only 1 in ours) after traveling because they broke so easy after they were lit.
Also, I remember climbing up to the light (not burning of course) and touching the mantel and watching it fall apart. My dad caught me doing that one time and I think ... to this day ... I still have red hand prints on my Southern exposure! (but I haven't looked in a mirror for some time now! But, after 60 years, I can still feel the heat! ... not from the light ... from his hand!)
That camper was definitely nothing like todays campers. It had a galvanized steal water tank that was pressurized by pumping it up with a bicycle tire pump. Oh, how I remember pumping that bicycle pump! And all the plumbing was copper.
It had a 4 burner propane stove (no oven). And the furnace was gas as well. The furnace did not have any blowers or electronics on it. It was all radiant heat.
The refrigerator was gas only too. I remember it worked very well, but we always had a cooler too.
It did have a toilet, but we were never allowed to use it. It did not have a shower, if it did, we were never allowed to use it either. I'm pretty sure the bathroom was NOT a wet bath, because I do clearly remember the walls being just like the rest of the camper.
Dad eventually removed the toilet completely and covered the hole in the floor. It because a storage closet. I remember that's where the lawn chairs were put when we traveled.
It didn't have a master bed, but it did have a couch that pulled out, the back rest cushions were laid down and it turned into a bed. The dinette folded down and became a bed, and it had a canvas cot that could be hung above the couch that could sleep 2 small kids. I always wanted to try it, but my parents would never let me. They kept saying it was unsafe. (go figure).
I slept in the over hang, my 2 sisters slip on the dinette, and my parents slept on the pull out couch.
The awning had to be inserted into the track above the door and then 2 long aluminum tent poles with ropes held the awning up.
I remember dad had weight distribution bars, he did teach me what that was all about.
I remember riding in the trailer, laying on the front seat between Mom and Dad, and listening to my sister's paranoia complaining about the camper breaking free of the hitch and come smashing into the back of the car and crushing everyone inside! (OK, she was a bit morbid, I agree!)
For being only 18 feet long, it crammed a lot of fun. My only regret is, I didn't pay attention more to what was going on with the logistics of that camper. I was too busy playing.
Would I want another one like it? Um ... no. However, one advantage it did have, because there were no electronics in the camper, no converters, no battery, no nothing, all you had to do was plug into a 15 amp wall socket to power the electricity. There were a couple plugs in it, and it did have very low voltage electric lights on each side of the dinette and each end of the couch. I suppose electricity was required to run a toaster.