condensation

I had condensation on windows on both my RV and my Pod during cool nights.  I found a really good insulation product at Home Depot.  It is a roll of aluminized mylar bubble material (similar to the bubble material used in packing).  It is slightly stiff when unrolled.  I carefully cut the material to the same dimensions as the interior window framing.  I can simply unroll the cut sheet and pop it into the window frame.  Because of its mirror coating, the bubble material acts as an opaque night shade and because of the air containing bubbles, it is a very good insulator.
I have also used it during the summer, when it was very hot and sunny out.  I would install the
shade on the sunny side of the Pod...it made a lot of difference in keeping the sun from overheating the interior (the Pod curtains really only give privacy not insulation).

Go to Lowes, Home Depot, Wal-Mart or the like and look for a product called Damp Rid.  I have the disposable bucket-type as opposed to the hanging one or the refillable ones.  This product is the bomb and works like you wouldn't believe.  I keep my rig so cold in the summer, I'd constantly get severe condensation.  This Damp Rid took care of all of that.

kickstart, yes, the 'pod is very well insulated.  If I remember right it has 2" in all the walls (vs. 1" for most trailers), and several inches in the floor.

We minimize the condensation in our 175 by cracking one of the windows at the head or foot of the bed, opening the roof vent, and running our space heater either on fan or heat depending on how cool we expect the night to get. You can do well by running the bathroom fan instead of the the space heater, but the bathroom fan is a little louder and I don't want to run it continually, as it would be more trouble and expensive to replace. 

On our 171, I usually leave the vent hood open an inch or two and crack open both the front windows to help keep condensation down.  Cool, moist air behind the curtain over the rear window usually causes a great deal of condensation too, so the curtain is left open when possible.