More likely, if you find locals who have certain pure breeds that match your's, you can ask for them to take your hens or roosters in exchange for x amount of fertilized eggs starting in whatever early spring month works for you. Then you can incubate and have some of the grandbabies running around and either next winter you're closer to being able to homestead, or you cull for meat and repeat the process with 1-2 of the best ones.
I could even conceivably see it being easier to strike a deal for overwintering pure bred roosters because of the quarantine period, and then the period it takes to introduce and get comfortable and still have time to have fertilized eggs. Then either get the rooster back, or the eggs.
I have done trades where I traded a rooster with good genetics, for an asshole who needs to be culled and I still was able to get eggs at a later date. So you could save the genetics, get a rooster (or hen) to eat, and either have rights to buy back, or have eggs at a later date. Framing it from a diversifying genetics standpoint it comes down to if other people close by either have the same breeds, or are interested in the breeds you have.