Agree (mostly) with gwk - 'most' lakes will allow you to use your big motor at the ramp for loading or unloading. THe rest of the time - not at all. I've not heard of any that require it to be trimmed up, but have heard other things like removing the prop, taking out gas tank, etc. It's site specific so best to check on the lake you plan to visit. Wish there was one reg for all lakes, but sadly there's not.