As for varieties I have about 30,probably 35 plants total.Ill PM you the list.They grow well here,most of my trees are young,the first few started fruiting this year,squirrels did damage in the spring so lost all my brebas and it knocked back the main crop,I've got Hardy Chicago and Brown Turkey with main crop this year but thanks to the squirrel damage they might not have time to ripen.
About 1/3 of my trees are between 2 and 3 years old,1/3 are 1 year and the rest are rooted this season so in the coming years I'll find out how most of them do.The trees grow well here,they like the mild winters and hot but wet summer were having.Some trees suffer from fig leaf rust due to the wet weather and I've got to fertilise often as the rains keep washing the fertiliser out it seems.
This year I've been focusing on growth,next year I'll switch to fruit mode on the 2-4 year old trees.Getting ripe fruit is the next challenge,I have yet to see how many varieties will do here,about 1/3 of my trees are local unknowns I've collected and some are proven to fruit here so I'm looking forward to that.Most of the trees I've bought are varieties which are meant to do wel in short summers.As a lot of folks here are in USDA zone 7 or below they focus on "cold hardy" varieties which will fruit even if damaged or frozen to the ground,here they won't freeze but those varieties also have the ability to grown and ripen quickly which is a useful trait here as well due to short summers and low heat/sun levels.
With varieties I've been selective as I don't have a polytunnel yet, but I have other varieties which are untested here so I'll find out how they do-if they don't produce I'll get rid..Ive learnt shed loads from this forum and the members here and they have been generous,probably 1/3 of my trees have come from exchanges.
You mentioned wind-freezing wind will do more damage than frost alone.