Let me try to convince you to bring a carry-on, anyway, even without toiletries.
I view a carry-on bag as a type of
travel insurance in case the airline delays my luggage. I can still have some of my clothes, my camera, my travel documents, etc. with me and under my control at all times. Let's say I have a reservation for a nice dinner my first night in WDW, but my luggage is delayed. If I take my dinner clothes in my carry-on, I can still enjoy dinner. Or what if I want to swim during that first relaxing afternoon or evening, but my luggage is delayed. If I take my swim stuff in my carry-on, I can still enjoy the pool. And what if my luggage is delayed overnight? I can pack my kids' jammies in their carry-ons so they can still sleep comfortably even if the airline flew my checked luggage to MCI instead of MCO.
No matter where I fly, I always pack my carry-on with EVERYTHING I need for the first 24 hours. Now that we can't pack most toiletries, my wife and I are shipping/mailing some toiletries to ourselves at our resort. WDW resorts will hold shipped/mailed packages for free for up to 5 days. I'll ship my small box of toiletries to arrive at POFQ about 2-3 days before we do -- that way, I can call before we leave and confirm it is there waiting for us.