Large scale ice water run length?

I’m doing 30 gallon ice water runs and freeze drying it. I want to keep the hash out as little as possible and started doing longer spins. What have people found the best time of pulls and number of pulls for large scale runs. And how much dried material in a 30 gallon run? I fit about 5 to 6 pounds. And can anyone recommend good quality bubble bags that are 30 gallons or bigger? I’m tired of buying new bags and bubble bag being my favorite only makes up to 20