For most, it would be easier to say where they DIDN'T store their things. LOL My mom knew and was quietly supportive when I was a kid and lived at home. She kept a small chest of things for me at the end of the hall...I think mostly to keep me out of her stuff, but also to protect me. My SO knew right out of the gate. However, as our family grew, we still had to conceal things. While I could keep underclothes and dresses with hers, my shoes didn't fit in and wigs - how do you explain that?? We kept things in locked chests, suitcases, and even the occasional box.
I have to agree with what Kitty said. Long term, you will most likely be found out and probably have lots of issues going forward. As hard as it is, I do believe it's generally better to open up to the one you love and be honest. Most spouses can deal with a lot of things if their partner is open and honest with them. Keeping secrets and deceiving them is when trouble starts.