Q: What gear can you store inside a closed Rev Tent? 

A:  Some flat bedding.   

For example, you can fit a MuthaTucka inside, it just may make zipping up a bit harder.  Depends on how evenly you spread the blanket out.  

Since the whole storage case / base of the tent is fabric - there is some flexibility in what can fit inside.  But do note, it was not designed to have extra storage space as that would have made the base too big and baggy for those Rev campers who don't store their bedding inside.  

Don't expect to fit 2 pillows and 2 sleeping bags inside. We've seen it done, and it ain't pretty.