Thanks for the comments. I ended making 3 five gallon batches. Each had 1/3 Dolgo (sg: 1008!, pH 3.38) and 2/3 of a mixture of MacIntosh, Paula Red, and wild apples. Final sg 1,062, pH 3.41.
We did an experiment:
1-One batch with nothing
2-One batch with EC-1118 Champagne
3-One sulfited (2 campden/gal), then tonight EC-1118
My wife is an old "back to earth freak", and wants to do things without the "evil" sulfites. I argued for the insurance when using sulfites. We'll see.
By shaking Dolgos trees with a large net under the tree, we got 5 gallons for one or two trees. Folks have planted those as ornemental left and right and are quite willing to let us harvest them. Finally, freezing turned out not to be necessary for crushing them, although the heayy duty drill that I have attached to the shaft of the crusher did heat a little after a while, something that I never see with normal apples.
More experiments next weekend: Likely a more potent (Lobo and Mac as sweating) + Dolgo + sugar + raisins. Could get about 4 gallons of elderberry and I am wondering if mixing the extracted juice with apple juice would be an idea?