I posted a picture of the big Plastic Box that is installed on the 1989 Scamp that is for sale
. It can be seen earlier in this thread. It's nice to have extra storage, particularly for items rarely used.
Today I added a smaller version of the 'bottom storage box. I bought an 12 x 10 x 3 inch plastic box with cover and screwed the cover to the bottom of the floor. The bottom of the box tightly clamps onto the cover.
I will add a bungee cord for extra security.
For example, I plan to use this box for my grease gun and a set of spare bearings. There appears to be room for 4-6 boxes like this. I think I would use them mostly for rarely used but always carried small tools and the like.
These boxes are not visible from the side of the trailer.
I have mounted this one box as a test. Assuming it works as planned I will add 3 more small boxes and one or two large boxes in the empty space between the grey tank and the rear bumper. I have just begun to think what I might store in these spaces.
I would have started with the large box but could not decide what to store there.