The fenders are screwed right into the frame. The trick here was locating where the voids in the frame were. For a refresher, here’s a picture of the trailer when it didn’t have the outside skin:
You can see where there are these cutouts to save weight on the structure, but I didn’t want to put a screw there, so I went back to my Sketchup drawing:
And used that to tape the outline of them from the outside. That’s the green tape that was on some previous pictures.
Putting butyl tape on the fender edge before screwing into camper. 
I love how the view2 from the workbench changes depending on the phase of the project. 
The inside of the galley door has had a few coats of paint and now Kayla is fitting insulation. 
Galley painted and dressed for the ball. I just need to screw in that aluminum trim.
My comment is I sure hope you have the most up to date, loud as can be alarm system, cuz that thing is so fantastic it will take a lot of willpower for a lot of people to not want to cart it away.
Outstanding.
Heck yes. Jeff b
I agree with Jeff, You better chain that to a BIG oak over night. It’s beautiful. You could get work for special design jobs. LB FIL
Beautiful!!!
Insane Fun-ctional piece of Sculpture you have manifested!!! Thank you for sharing your process with us…particularly satisfying was listening to the audio of the hatch clicking shut on your previous update. Amen and Hallelujah 👏👏🙌 ✨🤛
Simply amazing!