yes that will help, tho' I'm iclined to cover the surface of the bin with cardboard and put a wooden lid on it - they can stand pretty low temps, gathering in a crowd in the middle if it's too cold - they're not as active nor eat as much when too cold, but don't like it real hot either

I have a bin about 4' x 8' sitting on the ground that I load with freshly finished hot compost as I have it, filled as much as 3-4' deep by spring, and they have things worked over pretty well by the time I harvest the bulk of the material [including a lot of them] for the garden

Bill