As for era? The '60s and '70s, IMHO, are the best built. Solid frames though with few amenities compared to today.
Still wish I had the first TT my folks bought new in the early '70s. The only draw on the electrical draw was the lights. The water was drawn by a hand pump at the sink. No toilet, though. As I recall, probably 18 feet or less but slept six.
No TV. No radio. No surround sound anything. No A/C. It did have a furnace AND an oven.
Just a simple TT for a family to go camping in. No need for full hookups. Heck, no need for any hookup. Wish I had that thing for hunting now.
My current TT has a microwave, which I have no use for. Though, my aunt made me realize it makes a great bread box. Bless her heart, and she is right!
