My Square Deal was set up in my boy's bedroom for while.
When he grew to be a teenager, he became stupid and did all kinds of crazy stuff.
It must have been all the contamination.

But seriously, there is a surprising amount of dust and loose crud associated with reloading ammo.
If you tumble clean your shells, you will get dust and media grit floating around. It is mildly toxic due to the primer residue.
I suggest the kitchen for the tumbler if you do not have an outdoor area for it. Someone suggested a used dryer sheet in the tumbler to reduce dust.
I tried it and it seems to work...somewhat.
When you deprime, some of that toxic sooty stuff falls out. Not much, but after a while it adds up.
Spent or live primers fall into the carpet and get lost.
Obviously, you want to keep noxious chemical solvents out of the bedroom area as much as possible.
I suggest a vacuum cleaner with a HEPA filter to vac the room every once in while.
If you don't have a vac with HEPA filter, then at least get a vac that uses a disposable bag.
The HEPA filter should keep the txoic dust from blowing out the vacuum exhaust port. That would be a bad thing.