So, have now seen those wonderful creatures. Susa Group A - a very, very long uphill slog. Have some fuel food with you - trail mix, chocolate, water. (Bring extra to share with the porters.) I could not imagine not having worn good walking boots to hold my ankles steady - those vines, slippery bamboo poles, thick vegetation, steep inclines up and down the volcano, mud. My cotton gardening gloves were NOT thick enough - buy leather ones. A long-sleeved shirt is a must, and even then I was stung just where there's a bit of skin showing when you do up the buttons at the wrist! The vegetation was wet, so jeans would have been heavy and icky - wear overpants, which also helps you not get stung.
And just do it. The guides, trackers and porters all do a wonderful job and are quite passionate about their jobs.Do tip. Just look at the villages you drive through to reach the trailhead - you have far more in your daypack than they have in their homes probably.

