For hunting or riding? For riding, in addition to winch come along. various straps, and tree savers. Various tools. Its nice to have chainsaw with you, a bow saw on a tree can be a heart attack. Hatchet or axe is nice, I have recently added. Besides cutting, if you get your saw pinched it can get it out. Ya I know watch the kerf, use a wedge. Smallfolding shovel
Water is probably most important.
I have started to carry battery jump start. I am going to get a smaller one to carry on SXS and sled. I have thought about adding 2nd battery. Could just get a new battery more often. But batteries go a lot longer than what some people realize.