The bigger they are the easier they are as for backing. Hardest is a short trailer like a jet ski or snow mobile.
Our first trailer was a new 1973 Holiday Rambler 31' with all aluminum construction except the frame.
It was $10.000 including the hitch package installed on the 1972 Chevy 4 wheel drive suburban I towed it with.
And that by the way cost a whopping $7200 new including the ac and a 40 gal tank, which was needed. lol
A full hookup site in a K O A was on average 6 bucks a night, Ft Wilderness at Disney World was $16 a night in 1973, and there weren't any Wall Marts. lol
First time I ever saw $1.00 gas was in 1977 in Canada for a litter in the town of Banff, which is on the outskirts of Glacier Nat. Park.