I use a bike to get in to a place for turkey hunting. I used to bow hunt deer in there, and when I did, I made a rack out of a toddler bike carrier. I took the plastic part off that the kid sat in and used the frame. Then I cut out a piece of plywood and bolted it on. Strapped my climber on and away I went.
When I got a deer, I would put the chest cavity over the sear, strap the head and front legs to the handlebars and walk out. Hope this helps. Some guys make a little cart to pull along. But this has worked well for me.