For bedroom furniture our main category is for queen beds and casegoods. We have separate categories for king beds, full beds and twin beds, but sometimes more items can be found by going to main directory and using filters for those sizes.
For dressers, night stands, chests, etc. - same rule applies, if we have a distinct picture for those products, we post them in separate group, otherwise you can by everything separately in main bedroom category, just check those options.