Sooner or later you are likely to get some blood on your clothes, coat or pack, and in all likelihood these stains will be long-dry by the time you get home and are tough to launder out.
One old trick is to presoak anything that is bloodstained in a solution of water with two tablespoons of unseasoned (plain) Adolph's Meat Tenderizer per gallon of water. Presoak for about four hours prior to laundering, and there will be no trace of blood stains remaining when you launder the clothes. This treatment is not harsh to fabrics or colors, and works every time.
Another trick that works with many other stains is to apply a combination of hydrogen peroxide and squirt hand soap -- the same mix used to get rid of skunk odor on a dog. It is almost miraculous on red wine stains.