lucky guy! I'm impressed...ours are no where near ready to dig.
Sounds like you have a good plan to start with...here is what I would do with those.
1. dehydrate slices and vacuum seal with the recipe for escalloped potatoes.
2. dehydrate slices and vacuum seal for casseroles
2. dehydrate shredded potatoes for hashbrowns
3. dehydrate mashed potatoes made without the milk
3. can the smaller "marbles" with the skins on
4. can larger ones peeled and quartered for potatoes for stews, pot pies, and fried potatoes.
5. can potatoes and celery together for a base for potato soup.
6. cut some up when I'm ready for canning your end of the garden vegetables for vegetable soup.
7. Using a hand cranked meat grinder, I run onions and meat (either venison or beef though the grinder. Take the shredded meat and add diced potatoes and salt and pepper. Then can in pint jars for hash.
8. Cut some of the larger ones into french fries. Deep fry until they just begin to turn golden. Take out of fryer and lay on paper towels to drain off the grease. Then lay them on a cookie sheet and stick in the freezer. Once frozen, put in a ziplock bag or other freezer container. Now you have french fries ready to refry. They only take minutes to refry them and they will not turn brown/black in the freezer. (some time, I am going to try sliced potatoes like this, and see how they "refry" in the skillet. I also want to experiment on how they will Bake)
9. This is something I would experiment with...haven't tried it yet. I would shred some, add shredded onions and some beaten eggs, maybe a little flour and milk, salt and pepper. then bake them in a square casserole dish until they are cooked. Cut them into squares, then deep fry the squares for a minute or so...then freeze them the same way as frenchfries.... I've had great success with the french fries...
10. Layer dehydrated cabbage, dehydrated onions, and dehydrated onion slices in a quart jar. Vacuum seal and have a can of corned beef on the shelf for corn beef and cabbage...this is really good!
11 . Keep the rest for storage...