Does anyone have a similar experience and more importantly has anyone found a solution? A drogue or even a bucket over the stern have been suggested but I haven't tried either as yet. All suggestions welcome. 

I used to look after 80 moorings in our locality. ( I still lay them) max boat size is about 32 feet so not quite the same as yours. However, they are exposed moorings with strong winds. Owners have tried drougues, even plastic dustbins. But these are useles when the tide turns & is slack which is when the buoy rubs on the bow. Plus there is not a lot of room on a 30 ft boat for a dustbin.

Some owners have tried long painters but this means that when wind over tide conditions prevail the buoy rubs the hull & damages the gell coat for a great distance along the hull.

Some have a canvass cover for the bow to reduce damage. Others just pull the buoy up out of the water so it is locked to the bow & some then have a stainless steel protective panel to stop gell damage. This has the added advantage of protecting from anchor damage.

I would imagine that with the plumb bow of your boat ( most of ours are raked) you could have a nice canvas cover made to hang over the bow then pull the buoy up fairly tight, partially out of the water, to the anchor roller.

A lot depends on the size & condition of the buoy. An inflatable is kinder to the hull whereas a solid buoy covered in weed may not be so desireable.

You just have to experiment-- or go into a marina, hoist a "My Hanse" flag & be sociable.