What kind of structure would you build to manage humidity?

I'm getting ready to move to my property in the best place in the world (the PNW, sorry Paul, Montana is uninhabitable for 9 months out of the year) and I was thinking of building a cob house with a RMH, but I've spent a few nights there in a tent and am now worried that an RMH would (usually) make any structure I put out there too warm, and if I don't have any heating it will usually be too *humid* which is to say, it would be the same air as is in the tent and that air is about the perfect temperature and too humid, at least this time of year, and I suspect for broad swaths of the year.

Is a cob house with an RMH that is used rarely still the right choice? What do I do about humidity for the rest of the year? Should I just get a dehumidifier? Does anyone make a dehumidifier that outputs potable condensate or is that a pipe dream?

Shahar, there are devices produced today that extract potable water from air.
That device is essentially a dehumidifier.

Fir what it's worth dehumidifiers produce a decent amount of waste heat heat.
Air conditioners do too, but obviously they dump that heat outside.

I am capturing the water from one of my AC units and using it on my plants, but I wouldn't drink it.

This might be one instance where an  rmh is not your best choice.   Consider a rocket stove designed by Fox James, all truly works of art, with minimal mass. You could thus avoid the scenario you are predicting, i.e.,too much heat with a long delay.  

William Bronson wrote: I am capturing the water from one of my AC units and using it on my plants, but I wouldn't drink it.

I also run a dehumidifier most of the year (my climate is very similar to the PNW) and I also wouldn't drink the water. Luckily there is always a use for it (I use it for plants and for flushing toilets), but I don't think it's potable.

It would be good to know if you plan to have air conditioning?

Having a lot of window to open that will let in fresh air.

Buildings with crawl spaces, large roof overhangs and continuous cross-ventilation are ideal for humid areas.

Here are some threads that might be of interest to you or others:

https://permies.com/t/33877/house-hot-humid-climate

https://permies.com/t/50769/Vernacular-homes-humid-subtropical-climate

https://permies.com/t/63121/Cob-straw-bale-earthbag-hot

could you model after a termite nest? those things are ingenious in how they manage heat and humidity in even the most extreme climates