When I recently went on my Fundamental Bushcraft course I took loads of stuff and hardly used any of it. After a week I ponged a little but you'd be amazed how quickly you get used to not having a shower/bath a day!
Essentials in my mind:-
Pampers baby wipes (non-alcohol based or they sting like
! on open cuts/sensitive bits) are great for a "pampers bath" and actually go a long way. More than 2 in a week is luxury.
Small packets of plain tissues (great for tinder too if you need it) for wiping hands, blowing noses (particularly if, like me, you catch a snotty cold!) etc
Charmin loo roll (you've got to have some luxuries and that's mine! Don't forget to burn it or bag & carry it out)
A bar of soap for washing hands thoroughly (although horse chestnut does work if you wish to supplement your soap), for shaving and if the opportunity presents itself an impromptu bath or shower.
I personally like to take a small scouring sponge & a tiny bottle of washing up liquidwith me just in case (hehe!
) someone may have burnt food onto the bottom of a billycan/mug etc whilst cooking.
For a longish trip I'd also take a small squeezy bottle of clothes washing liquid (1 week plus) or you really stark to stink.
I only take 1 set of clothes (the ones I'm in!) and some pants/socks for changes for a week in temperate climates, and 2 if in hotter/sweatier/wetter/colder climates.
A traditional shaving brush is also great to use with the soap for shaving (sod all the shaving gels and stuff!) and a razor (light, and tiny!)
A proper tooth brush (you can always cut it down slightly) and toothpaste.
In my view there's no easier or quicker substitute to make you feel cleaner than properly washed teeth...
Bear in mind EVERYTHING I take is cut down or miniature to save weight (unless I think I'll run out, which hasn't happened so far). Mini bottles are great , like these
Bottles
Bit of a ramble, I know, but......
Phil