I used to hide my purchases, but little by little my DH has shown more and more encouragement in my hobby. He bought me an Oliso iron, made my big board (after MANY head-aches), made me two "basting boards" the other day (so I could baste the Sharon Schambers method) then watched what I did with the boards, and he repeatedly tells me I need to re-organize the room and make suggestions for doing it. Oh ... he even bought me an embroidery machine recently, I didn't even ask for one! Heck ... he even picked out the fabric (from my stash) for the beach bag I made for us.
So, I no longer have a need to hide stash. Now I show him the pretties I bought and tell him my plans for it. Most of time he fakes paying attention
My husband mad me 2 different size light boxes for paper piecing for me.