my dad used to always build our own wooden ladder stands, and i took over when i was about 12. would use 2x14's or so, basically making a ladder up to the platform and then supports around it. would use a chain and chain binder to attach to a tree, that way nothing is getting nailed into the tree/you could move it if you wanted to put the stand in a different location. it was really nice to have the big platform and very secure, much more so than hanging on a stand with tree steps screwed in below. we would either nail a small seat into the bottom of the platform/tree; or carry in a portable seat every time using that stand. treated wood lasts a long time, and we still have wooden ladder stands up.
we don't build them anymore, simply because it's cheaper to buy metal ladder stands. they're a lot lighter and more maneuverable as well, and even more comfortable sitting on the larger seat.
we do have one stand that is wedged between 2 trees with a ladder leading up to it, but don't sit there much anymore because the wood might be bad and the deer don't move by there as much...