Bolger's Nymph is a great example of CLC's type of building
Payson focused a book on it introducing a huge audience to the method
https://www.amazon.com/Build-Instant-Bo ... 159&sr=8-3the process is quite forgiving and amazingly strong
up to 1/4" gaps glued together w/ thickened epoxy and covered inside and outside w/ fiberglass tape set in epoxy (don't use polyester "fiberglass resin" like was used back when the book was written because it's bonding characteristics are considerably inferior and it doesn't work nearly as well when thickened for filleting like epoxy) creates joints with strength that equals or exceeds the strength of common framing methods most folks/industries still use
i used this method of building w/ my junior high students from the 1980's > w/ great success
i even taught my dad how boats(got his start in boat building in the late 1920's) can be created w/o the use of permanent metalic fasteners
as i visit this forum regularly i am surprised that more folks haven't resorted to this method of construction
simple tradition holding folks back i guess ¿ ? ±
here is a simplified shot of the process(the joints are not required to fit this well for maximum strength)

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(A) edges stitched together w/ fine wire or zip ties and adjusted for joint/line/curve fairness
(B) a thickened epoxy fillet is applied and when cured the stitches are removed
(C) fiberglass tape is applied
(D) the outside is rounded gently and taped w/ fiberglass set in epoxy
the resulting joint's strength exceeds the strength of the wood
covering the outside of the structure(shown above) w/ fiberglass set in epoxy competely seals it from the elements
this makes the use of common exterior construction lumber/plywood a fairly good choice since the checking commonly experienced WILL be eliminated ;-)
sand and paint as desired
if you use fine hardwood/marine plywood you can finish it w/ a good UV inhibiting varnish(most epoxy will degrade if the UV inhibiting finish is not used

) and have a beautiful long lasting natural finish
at this point the only avenue for water intrusion will be your openings(windows n doors etc)
the process is EASY and when you factor in the expected sound life of your trailer it will be less expensive over the long haul
there are lotsa videos out there
DuckWorks BBS is my goto source for supplies (ima cheapsteak and have never had a failure related to any of their products)
https://www.duckworks.comsw