I think a lot depends upon the scale at which you are operating. I would boil or filter for small scale situations. Not atall sure about using the chemicals you propose.

honey buckets. I recently use, with very satisfactory results Wag Bags, which handled waste very satisfactorily for two weeks for three to four of us. Not cheap

At a larger scale, start digging (easy for an archaeologist to say). I have used a plain slit trench, shoveling in a bit of dirt afterwards. Years ago, in a field situation involving about thirty people for six weeks, we did use lime , with no problems. Just be careful.

No opinion on antibiotics. Although it is mundane, apparently washing hands carefully, especially after the toilet, is really important. I would tend to avoid large crowds, for all kinds of reasons.