Thank you Scott for your input.
As far as I am aware we would likely be able to bale our own hay, but not in large amounts, there are places to buy hay from the mat-su area but it is very expensive so I am thinking of trying hardy, smaller breeds that need less input. We would also have to clear areas to have our own hay fields first and that will likely take a great deal of time, but its important to do the ground work necessary before jumping into livestock.
As for predators, I know they are problematic, especially once they figure out that livestock are tasty and easy prey. For example here was a post on a farmers facebook group recently where some farmers in Butte are tracking a bear that exclusively targets chicken coops. However, I figure that most LGD's very developed in regions with similarly dangerous wildlife so they should have the temperament and size to deal with trouble.
As for breeding stock, there are some sheep breeders in alaska, but I would likely need to ship up some stock from the lower 48 states. My hubby is likes the welsh mountain sheep breed so we may go with that variety and the closest breeders I can find for them are in washington.