Thanks for all the great input. .

This is a "period" tent for mountain man rendezvous so we wanted wanted a period correct option. My wife made a canvas rain fly and an awning so we will just water proof those.
I use a plastic tarp for a rain fly when hunting.

Thanks

"Socialism produces bad music, bad art, social stagnation and really unhappy people", “I am a conservative, and you may not like that, but I am.” Frank Zappa 1986