Advice on new queen please

[longarm]

This question is posted for a buddy of mine who is wanting to requeen his VERY hot hive.
He lives in Bend, Oregon which, for those unfamiliar, is the high desert at elevation 4000ft. Some clover and lots of rabbitbrush, aster, etc.
His hive produced the most delicious honey this year but even in a full suit he routinely gets 10 or more stings and literally hundreds of bees following him back to the house, etc.
Anyway what kind of bee is best suited to the high desert?
When should he requeen?
Thanks.

[Brent Bean]

Any dark bee like New World Carniolan, you can find several breeders in California. They will fly in cooler and wetter weather than other races of bees that I have. As far as when to re-queen? Here in Michigan May, but I have no idea what your weather is like. When you see them bringing in a lot of pollen the time is right.

[longarm]

THank You Brent.