Keeping toddler out of baby items?

I currently have a little boy who will be 2 in August. His baby brother is also due in August, a week after my first born’s birthday.

I want to put together things like the baby swing and bouncer but my toddler is very explorative. Lol.

I still have his baby swing up (he napped in it til he was 14 months and then I became pregnant and didn’t want to toss it until I knew if we were using it) and he constantly climbs in and out of it.

We are locked in a lease until March so we currently have a 2 bedroom, which means there’s no where for me to “hide” the baby stuff once it’s set up.

So do I wait to set it up until very last minute or constantly tell me toddler no? What do you do with your little ones?