I normally keep the top of my bucket showing just above the nose of my hood, which I estimate puts the bottom of the bucket roughly 18" off the ground. This balances against my boxblade well, gives about all the visibility I'm going to get and keeps the center of gravity lower. I raise as necessary to clear obstacles and then resume said height. In rare cases I have run my bucket on the ground in float while bushogging very slowly thru high, unknown fields.