Not very much is needed for cleanup.
If you only boil water, and, use the freezer bag cooking method all that is necessary is to pack out the used freezer bags and food packages.
If you repackaged everything at home or in the car before you leave the trailhead, there is much less packaging to carry out.
I use an odorproof OPSak to pack anything having a strong odor, both in and out.
I use vacuum packaged food, when I can. I package it myself. Otherwise, I select shelf stable food.
For toiletries, I find unscented products. I also find biodegradable soap. Nevertheless, these products go into an OPSak.
This is because bears and other chewing critters have a more keen sense of smell, than we do.
I have an OPSak for my food bag and another OPSak for my trash bag. Nevertheless, I carry one lawn-and-leaf bag, so if I find a campsite or trail to have trash I will carry it out. If it is more trash than one large trash bag I can pack out, I report it to the Forest Service, the Ranger, or to the city or county, or other appropriate authority.
These are my toiletries.
The toothbrush is short, the toothpaste is repackaged in a small container from a store travel section. I added a few plastic toothpicks.