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1. Scent Control
While this can be taken to any level of extremes, I guess you really cannot be too careful with regard to this matter. Some basic steps you can take include the following things. Do not wear the clothes you will be in while hunting until you are heading into field. Consider keeping your clothes in some form of scent proof bags until you get out of your vehicle (or camper, tent, cabin, etc.) and then slip them on just as you are ready to head out. Don't get up and cook breakfast for example and then wear these clothes to the field.
Remember this for sure; do not wear the boots you will wear in the field until heading out in the field. On that point, it is pretty well established that rubber boots carry the minimal scent of any other type of boots. If you are not in a cold place, cheap rubber boots are fine. More expensive lined (thinsulate is usually the material) boots may be required in colder climates. Scent-Lok materials are available for clothing and boots if you wish. Not required. Also, there are laundry detergents, deodorants, and scent-blocks available and these may be advisable, but again, are not absolutely necessary.