No less than 2 people for set-up. All brands that I have used come with an adequate ratchet strap to the tree, but realize they will need to be replaced from time to time as they weather. When I first saw the additional cross-straps, that run from top-corner then behind the tree to opposite bottom corner (making an "X" behind the tree), I thought those straps were just more work and not worth the effort to attach. But I've learned they really do stabilize the stand as well as prevent the legs of the stand from pulling out of the ground.
When putting up the ladder stand, put some outward "bowing" tension on the ladder with the metal support bar. This prevents the stand from flopping in and out from the tree while climbing. Then use the cross straps to prevent the legs from popping out of the ground away from the tree due to the outward pressure from the stabilizer bar.
Personally, I've come to really like the ladder stands with a shooting rail. I feel far more secure with the railing around me. I'm also a big fan of the web seats.