It'd be interesting to compare to the dreams of people who take the drug without travelling, e.g. medical staff native to malarial regions, who take it as a prophylactic when interacting with malaria-infected patients.
I can only speak to my own experiences, but while I have observed the phenomenon you describe in preparation for travel/while travelling, Chloroquine dreams were waaaaay more dramatic than anything I've experienced with other travel. I forget what the exact timeline was, but I think I started taking them about a month before departing, and the dreams started about two weeks before departing, and stayed pretty much constant until a few weeks after I'd been home and stopped taking the pills.
The area I was visiting was not so different from other places I had visited or worked, just with a greater chance of maleria and lower chance of getting quick treatment.
During your waking hours, nothing feels amiss at all. Keep in mind too that the dosing is once a week. It took a week or two for the effects to start for me, and they persisted for almost a month after I was home. Unlike reports from the various psychedelics you listed, I felt absolutely no euphoria or “spiritual awakening” from any of it; I just woke up every morning and thought “wow, that was fucked up!”