I'm headed out for three nights. Having someone come in on day two to feed an mist. Chams get a lot of their water from steady humidity. Plants help a lot with that.
I have a monsoon (until i get my mistking) so I cannot comment on the reptirain but almost everyone here will say save for the mistking. I personally like the monsoon because it looks nice and works out of the box but it has a history of issues.
You can either do the starter set and add more nozzles or do what I did and buy the advanced set. I only bought this one because I know im getting another cham its just a matter of time.