Re Backing in
Those that back in usually do it for the convenience. Depending on how much water you have at your dock also has a bearing. Neighbor backed her new H36 into her slip for the first year. Loved the ease of loading and unloading. On her haul out the following spring she was dismayed to find that mud/slime had rubbed all the ablative bottom paint off the bottom half of her rudder and she had a nice barnacle farm growing. Thankfully we have a soft bottom so physical damage was done.