Go for it
I try quick sketchy things that don't take as much time to test.
That's part of why I do those quick ridge line things - even if I were to go with iso, they still help define where all the ranges are.
I'm sitting around today doing my taxes and trying to plan out roads/routes and maybe some regions or states within this country.
I still haven't decided on the level of tech or the main cultural elements.
My little dialogue with Tonnichiwa sort of says some about those things.

I might go with a sort of pseudo-renaissance level of tech and culture... not sure yet though.
Might even do a few simple city maps for some of the important cities