I bought Walmart's cheap blinds, vinyl, could only find French cleats in a surplus store, same idea.
I put 2 25 inch ones on the big window and 25 inch ones on the other 2 windows in the front part of the trailer. I cut a finger on a box cutter so the small window in the back bunk end still has to be done.
The French cleats have 2 screws in each section,
On the blinds, I was afraid the screws would pull out, so I went back and bought a package of 1/2 bolts with the nuts, they went into the screw holes and were short enough that it would not affect the blind operation.
used the 3/8" screws that came with the French cleats in the wall. Used 2 sided tape to hold the French cleat straight on the wall and on the blinds after not being able to keep the cleat from moving when I was drilling (that was where I cut the finger, cutting the tape.
I have more z track, the actual stuff where previous owner had put shelves up in back bed on bathroom wall. Not so practical so I took out the shelves, but left the other half of the z clips. Will remove off shelves I have in shed and the clips on the wall for the last blind next trip out.
I do have to hold the blind to raise and lower.
Thank you for the inspiration and the pictures.