the biggest thing I started 2 years ago is to bleed the fish as I catch them, it makes a big difference. i have a 5 gallon bucket and a pair of scissors, just cut their gills and place in the bucket with some water, after about 5 minutes place in the cooler. The cleaning table is also less messy. As far as zippering last I checked we still live in America feel free to do as you choose.