Salty makes a great point^^^
Also, if you are planning to submit a permit app, or even if you are trying to plan a time to set aside for trying walk-ins I might suggest aiming for mid-late Sept. (after Labor Day) the permit demand goes down, it gets cooler though Bighorn Park will get an brown tinge.
Most people assume it will be too cold, I don't expect walk-ins to remain scarce that far in to the season.
