not an answer to your question, but: i haven't tried drying yet, because i don't think i have to. in addition to tolerating drying, kveik yeasts can last a long time under beer in the fridge. i keep a slurry in a small jar in my beer fridge. when i want to use the yeast i'll make a small starter, pitch some of it (not much!) into the new beer and return the rest of the starter to the small jar. i've gone 7-8 months between uses and the kveik wakes up just fine.