Well I think there are two types of homemande blinds. Type one usually just involves a fixed position blind using branches, leaves, dead limbs, etc... That is easy, especially if you have a deadfall close by to start with. The second type is normally when someone uses PVC piping or dowel roads in conjunction with camo netting material to create a true homemade portable blind.

I don't have directions for the latter but cannot see how it would be difficult provided you had someone with skills in sewing and some of the raw materials. Attaching it to the supports poles might prove tricky though.