Laminate is far easier and probably better than hardwood.
There are also many other good choices on the market these days: stick down tiles of carpet or vinyl, sheet goods, linoleums, etc., etc.
See this thread for my renewal of a 1976 Argosy 24:
I’ve just layed a seamless piece of very good quality linoleum, trade named MAROLEUM. This product also comes in click together panels (like laminate).
I am going to paint the inside walls with INTERIOR grade OIL paint by Benjamin Moore. (The bath will be done in two-step Epoxy- in white).
Latex may have more “flex” but I think oil will be more durable.
Even after washing the walls carefully there is still “slipperiness”. I suspect this is emitted from the vinyl cladding over time. The trailer was hardly lived in and was not dirty.
I’ll use a good quality primer such as Zinnser’s One Shot.
If you keep the vinyl-clad aluminum that's OK too, but you live like Airstream thought you should in that day.
You can paint it to suit your own unique taste.
Don’t be afraid to do things differently.