Let’s start with deserts and Rockies in the lower 48.
The variables I'm suggesting include, is the tag holder an experienced sheep hunter, or has experienced help? Do they live close or far away from their unit? Are they dirt poor, or have expendable income, etc. etc.
In most western states where tag numbers are relatively large for
residents,(Montana, Wyoming, Nevada, CO) I think a majority (80%) do not hire an outfitter, but probably few
NR's (10-20%) go DIY. In Wyoming it's required for an NR to be guided if they hunt in wilderness (most units)
Given how hard it is to draw a sheep tag and the
once in a lifetime reality of the tag, I think anyone who doesn't have serious sheep experience or help, is nuts to not hire a guide.
I've studied the NV checkout summaries for years and it was easy to see the serious sheep hunters vs those that didn't care that much, by the success rates and the days afield.