Well to further John's suspicions I've recently purchased 3 kegs (3 gallon each) to add to the system. The intent is to have running water available for washing up even without a garden hose in reach.
Don, to prep berries for later adding to the ice cream mix first rinse them. Next use a food processor to puree. Then strain out the seeds with a fabric paint straining bag (Lowe's) or usually much easier with a food mill if holes are not too large to pass seeds. Finally add enough sugar to taste sweet or just a tad too sweet and freeze.