I use electricians tape to cover both CF and ML barrels.

Jimmy you carry a pen in the bush? If so is it a Sharpie???

If you rely on a GPS have spare batteries and keep them warm(a shirt pocket under a coat is perfect!). Always carry waterproof matches, lighter, spare gloves, trailmarker and hand/foot warmers just in case ( a bag of trail mix is another good thing to tote and it don't take up much room). If you hunt alone or in a group it is always good to let others know your plan for the day(vice versa). Thin layers of clothes vs bulk &a void cotton like the plague-polyproplene, wool, fleece are much better choices. Take H20 and avoid caffine drinks which makes you void more, it also will affect your body temp. If you need hot drinks soup or hot water is a better choice. Don't leave your site in procedure to the last day or weekend get out and start early, practice is never a waste of time or money.

Be safe and have a great year!