I think crabapples put on more fruit than regular apples, in general here. 30-06 and droptine are 2 good ones.
MY thoughts. 1/4 of the trees provide food before hunting season, 1/2 of the trees produce fruit during hunting season, 1/4 provide late food. Make 1/2 of them crabapples, but still have some for humans too. Have a few early droppers, atleast one.
Meet in the middle.... trailman, chestnut, and kerr are crabapples people can eat.
Get one or two before hunting season apple planted close to the house / camp. You can harvest without bothering the hrd out back. trailman, redfree, or williams pride will likely be good n ripe well before labor day.
Far as size goes, crabapples are tough to compare. Many apples are in the general size range, but crabapples can vary even more. A 2.5 vs 3 inch apple is way different than a 1/2" vs 1" crabapple.
Another factor is bloom times. My crabapples are fully leafed out when most of my apples are just starting to pop out.
I have a round of wild crabapples I am looking at for a few years. Because you see a bad year deos not make it binennial. Could be frost damage. Also, how does a tree respond to drought stress? Some can fight better than others.
Really liking the 30-06 so far though, deosn't bloom as quickly as most crabpples do. Seems to be on par with enterprise so far, bloom group 4. Got way too much cedars around for droptine to be happy. I did spray copper twice on my CAR trees this year. Need the copper more for the peach trees with peach leaf curl.