Wonderful trials, Meadow!
Our springs make for good pea country. Usually! 2021 was a real exception with those
all-time record high temperatures in late June. Powdery Mildew will likely take the plants out by midsummer but I have the habit of removing them by that time. Only once, that I can remember, have I had problems with Downy Mildew. However, by midsummer, there are plenty of bags of peas in the freezer

.
I've not grown dry peas but, as you probably know

, the Palouse area of WA/ID is the "dry pea & lentil capital" of the US. Probably a shame that I don't grow them because I like the soup! I have had weevil problems with saved pea seed so ... I'd need to learn how to deal with those pests.
Never have I set out pea starts but I'm sure that it should work okay. Snow pea seeds will be sown again about the 1st of August for a fall crop. This often doesn't work because hard frost will kill pea flowers but we will be enjoying the tendrils before (sometimes "& after") frost danger.
I consider growing dwarf varieties as a waste of time. NOT a waste of time for production but a waste of time for trellising - that was necessary each time dwarves were grown - may as well grow taller varieties ...
My choices aren't very unusual or varied. Sugar Snap, Mammoth Melting, Oregon Giant Snow or Oregon Sugar Pod, and Green Arrow for shelling.
Steve