No need for a guide, DIY is the way to go. Lots of areas have trophy bucks. Wyoming is 50% public land so no need to pay for an antelope hunt.
A 5 day hunt would be plenty of time to find a nice buck and fill some doe tags, maybe get in some sage grouse hunting along with blue grouse in the mountains. Fishing is awesome that time of the year.
We do have a random draw for a few tags in almost every area that can be drawn with 0 PP, but having at least 1 or 2 opens up some better areas.
Onx maps chip in a GPS is necessary if you get an area with lots of private.
I live in Laramie , Wyoming and hunt many parts of the state.
Lots of info out there, you should check out Hunt Talk or Eastman's forum for hunters help with info.
My B&C buck came from an area not know for trophies.
Here's a few decent bucks from non trophy areas.