In Colorado, the elk are managed for quantity,not quality.Every unit might have 2-3 each 300+bulls,but they are few and far between and just as many are taken on OTC tags as drawn tags. 4x4' s and small 5'xs are the norm of elk taken and if you see a legal bull,you had best shoot it because it might be the only one you see. During peak rut/archery season, you might have a better chance of an encounter, but overalls success rate for archery in CO is about 10%and that is for all elk, bulls,cows, calves
I would not pay a private land fee unless the success rate for a 325+ bull was very good.
My biggest bull, which I measured was 343 and taken in a trophy unit in NW Colorado that issued only 25 tags a year.That took one took me 21 years to draw.
I have that one mounted and two 5x6's .One taken in Alberta on a guided hunt back in the 80's and one DIY in an OTC unit in Colorado