either, think the books say u do it fresh frozen. we always do it dry since we dont really plan our hash making around crop time.
I personally like the idea of fresh freezing. It's convenient, should help break off the trichomes, and prevents any deterioration that may occur during drying.
in my experience we always use fresh freezing and the results are amazing, dried works fine but due to the fact that your using water they are gonna get wet anyway and the leaf breaks up into much finer particles and can actually become small enough to taint your end product flash freeze and use lots and lots of ice
guess this kinda plays into what u are after though. we only use the trash bag and the A bag. never 100% melt but most are not that picky. and it should never break down enough to make it through the trash bag unless u are spinnign it way to long or to many times