Here is the baby wipes recipe that I use:
1/2 roll paper towels (cloth-like towels like Bounty or Viva--don't use the cheap ones!)
2 tbsp unscented castile soap (I use Dr. Bronner's baby mild)
1-2 tbsp sweet almond oil (sometimes I use a combination of sweet almond and castor oil)
2 drops lavender essential oil
1-2 drops tea tree essential oil
1 1/2 cups distilled or boiled (and cooled) water
Stir water, oil, soap, and essential oils together and pour over paper towels. The lavender and tea tree oils will help prevent mold/mildew growth on the paper towels. If you don't want to use paper towels, you can store the solution in a spray bottle and spray a clean cloth before wiping baby's bottom. You could also spray on a paper towel instead of soaking them. You can either store the roll of paper towels upright in a plastic container if you have one that will fit, or you can fold the towels accordion style and store in rectangle container. I use ziploc watermelon containers and can fit 1/4 roll folded in each container. I pour 1/2 the solution in each container. You may have to adjust how you pour the solution to make sure that the towels are evenly saturated. Adjust water amount as needed. If you're storing the paper towel roll upright, after soaking towels, remove the cardboard tube (it will slide out easily if you wait until after you've poured in the solution and the tube is wet).
Here is a picture of the watermelon container that I use. I have two containers, which is perfect for us because I can keep one upstairs and one downstairs.