British Columbia: siting a small (20+-) orchard on the ocean

I am looking for some feedback on the placement of apple, peach, pear, medlar, and plum trees. The land slopes fairly steeply to the ocean on the inner basin of Sooke Harbour. The area that would be planted is roughly 45 by 60 feet. The soil is undisturbed, very rich and loamy where rains have washed it down over the years. I would build small terraces in half moon shapes around each tree to stop the erosion happening again. Higher up the bank it turns to clay. It is a South facing slope with good drainage. During the snow and frosts this last 2 months I have watched to see if there were any particular cold pockets. So far, none. There is a level patch approx. 20 by 20 at the bottem of the slope where it gets colder than the slope does.
There is no direct prevailing wind, it is a fairly protected site in that respect. An excavator came and removed the top 3 inches of grass and the site is ready to plant in February.
Should I consider fencing along the seawall? If there are cold winds they are mostly in late spring when the trees are in bloom. It is possible to put a 6 foot fence in place for the 45 ft or so it would be needed. Would it be better to plant 6 foot evergreen hedging and space it for wind reduction as opposed to a solid wooden fence?
I have grown Gravensteins successfully in the adjacent property, Stanley plums and Desert King Figs. The fruit trees on that property are very protected and well back from the water however. This available area is very different from what I have done before and am unsure just how the cold air flow at night and during the winter will affect fruit set and ripening.
I am planting older varieties, mostly eating and storage apples.
I need some advice on local (Southern Vancouver Island ) peaches. This winter is unusual as we are having actual freezing cold and snow. Usually there is neither on this property. Is it possible to grow nectarines here?
I currently have 2 Desert Kings that are 8 yrs old and they crop well but only sweeten up if we have the good fortune to have very hot summer or September.
There are 3 Himrod grapes on the plateau above where the orchard is set to be. I am looking for suggestions on another variety to grow in a very protected site behind my house.
Any help would be muchly appreciated with these questions.
thank you

 

To cut wind for trees you need something taller than 6'. Don't put anything across the slope that may trap cold air behind it too close to the garden area.

The best system for diverting wind is a thick planting that starts with low shrubs at the front and builds through taller plants to trees at the back, resulting in the wind being lifted up and over the area to be sheltered.

 

I would recommend an espalier plan for all your tree crops, as the cooling marine influence is much stronger at Sooke along the Pacific coast line. A suitable retaining wall for heat capture would be part of this design. This will also be in addition to the natural wind break that could assist with this endeavour. Grapes and Fig would ripen fully with this arbour/espalier gardening technique... google espalier....rock wall gardens etc...