I have lost count of how many trips I have made to my "mulch patch" I found a place where I could get free mulch and have been there well over 20 times with my trailer, hand-forking about 1 1/2 yards per load. It takes about 15 minutes to load, and well worth the effort, based on the results I am getting.
Each bed now has at least a 4" cover of mulch. Yet this is an on-going process. Each year will need new mulch to ensure the organisms are properly fed and soil is sustainable for all the plants. Trips to get more mulch will begin again in late February.