well, I think you mentioned like 20K+/- size ranch...in NW montana, that is a pretty good sized place..so it really limits where you will be...in Central and norhtern Montana, that is a back yard
but if you have 20K of private to hunt on (which would probably mean closer to Eureka), and if they know the land well, that will be a fun hunt for you...I am only about 1.5 hours from Libby...the hunting is STRAIGHT up and down...and VERY dense timber...not long shots at all...So bring several extra pairs of boots, as you WILL soak them through several times...and LOTS of extra socks...and drink PLENTY of fluids...
but most importantly, place a phone call...it is only a local one...God is a full time resident!!!!