Small Cabin Interior Finishing and Design
Insulation of the Small Cabin?
Before doing any interior finishing work, decide whether you want to insulate your small cabin. I.e. do you plan to use it during colder months?Think well - installing insulation after all interior work is done could be quite messy and time consuming job. I decided not to insulate my cabin, mainly for the reason of hight cost of the typical insulation material - I just couldn't justify it for my occasional use of the small cabin. Also, both exterior and interior panels with two layers of moisture repellent material should provide some degree of heat insulation. Consider using some sort of alternative cheap or free insulation material - perhaps reuse packaging styrofoam blocks or layers of cardboard.
Small Cabin Interior Walls
I'd recommend stapling a moisture repellent (polyethylene) film to the interior side of the wall studs before nailing the decorative panels - this will add moisture protection to your small cabin, preserving the cabin structure and things inside like furniture and clothes, etc.
Then I used 4x8 ft decorative sheets/panels for indoor finishing. Just measure, cut and nail to the wall studs.
Because I selected finished decorative panels to be used inside, there is no need for painting interior of my small cabin. The wooded look and feel suites me well there.
Floor
You should cover the bare pressure treated floor plywood.If not covered, it will wear off pretty quickly. Also, covering PT plywood will reduce possible emission of the chemical elements and odors into the cabin.
Simple linoleum roll or self-adhesive decorative linoleum tiles will work.
Shelving and storage
As see fit.