I can not add anything to the OP, but I would like to add that (for deer hunting, at least), I always wash whatever I'll be wearing with a NON-UV Brightener Detergent.
Deer and perhaps other animals see the UV brighteners as a bright glow that looks very un-natural to them. I also use the scented (I usually use the Fresh Earth Scent) Detergent and Dryer Sheets just in case.
I know that some animals like Turkey and other birds do not seem to worry about your scent, but I believe it's better to be safe than sorry and I wash ALL my hunting clothes in the scented, non-UV Hunting Detergent, and put them right away in the plastic bag Scent Safes, so they won't collect any unwanted odors.
I will also make sure to fill the gas tank at least the night before heading out while wearing regular clothing, and then take a shower and wash my hair with the hunters soap/shampoo.
Is this all overkill, especially for animals like squirrels? maybe, but my feelings are you practice like you mean it for real. IMHO, it makes you a better hunter and woodsman when you do it this way.
What are your thoughts on this?