As per some others, above. A combination of both blade up and down...
"On passage" or simple approach to easy-access berths, then use the full rudder (subject to water dpth/obstacles, of course!) with about 1/3 or less c board down. Reasonable manoeuvrability, and reasonable directional stability provided by the keel-like board. Outboard left fixed straight ahead, and ahead/astern propulsion as needed.
In "close quarters", particularly in high winds, I use the outboard as a directional thruster (easier to think of it as a "puller"really?) With the rudder raised, and maybe just a little board down (appropriate for water depth!).
However, when down the BRe rudder is effective using the outboard going astern, as a puller, and I sometimes leave it down (caution, see below).
Rudder up, you can use the outboard in reverse, rotating it as required, to pull you stern first into very tight spaces, the bow weathercocking away from the wind. Weathercock effect is very pronounced on the BRe (cabin, and maybe sprayhood too).
The braking affect of heading up, being pulled into the wind adds an extra degree of control.
As mentioned above, the stern thruster technique is taught on power boat courses. Some can be similarly skitty in high winds, and with this technique, the stern remains well planted due to the prop/leg (it's even better on twin engined boats).
CAUTION. Be very sure that the water is deep enough, and free of obstacles, as pulling the boat astern in this way means that the normal "kick up" protection for motor, board and rudder will not work should you contact bottom! Things can get very expensive, very quickly. Hence my default method is to berth with rudder, moving ahead where possible.