Udo Rumpf wrote:
The route I have chosen is to seal the trailer up as tightly as
possible and install a small dehumidifier inside the trailer. I then
do whatever it takes to get power to the trailer to run the
dehumidifier. The extracted water is drained through a small screened
hole in the bottom of the trailer. It all stays bone dry inside even
during the wet season where it can rain continuously for days or weeks.
The dehumidifier cycles itself on and off as necessary via its
built-in humidistat.

what would you think a max sustain humidity level could be for a set up like
that and still have good result?

Udo,

I'm not sure. But I have quickly opened the trailer door during a
steady rain, after 3-4 days of raining, and wiped my hand over the
glider surface. It was dry.

I should mention that sealing the trailer up tight (silicone seal
around the door frame, etc.) is also a good way to keep out bugs.

Regards,

-Doug