I bowhunted The Gila National Forest a few years ago and I thought I was prepared for the horse ride..I wasn' t!! We had about a 15 mile ride and after about 6 my legs and bottom were sore.If I were you I would ride and ride hard before you go out.As far as gear I would take warm,cold,and rain camo.In the mountains you could get anything from 100deg to 10deg.I would also recomend some baby wipes for cleaning yourself.If you have water around take a bottle of scent free soap,a rag,and a towel.I also would take a bottle of advil and some pepto.The advil is for the elevation headaches and the pepto is for the three dutch oven meals you will be eating a day.Good luck