Yes, make your request at the time of reserving your room/package.
When you check-in, ask the CM if your request was noted and
if there's any chance of it being granted?
As kaytieeldr said, there are no patios, only walkways.
When we stayed at ASMo some people on the first floor
did bring their chairs outside of their door to sit (your door is the same
as everyone elses, too, in answer to your question).
We were there during Grad Nights (never again at the All Stars!!),
and the kids had half their rooms all over the walkways.
Was NOT fun coming in late from the parks with a stroller and
sleeping toddler, having to dodge furniture!
Some people also left their strollers outside of their rooms on the first floor,
which we didn't have a problem with because they nicely kept them
close to their door - not on the walkway.
Have a great trip, and just remember the Golden Rule

.