I can't get onto the floor, and if I could, I probably wouldn't be able to get back up! lol
So, I use our king size bed to sandwich the layers, with a 2' wide by 4' long folding table at the foot. I lay everything out on the bed, then slide it up onto the table, with the legs of the table set up on bed raisers to a workable height. It sure makes life easier, and saves back aches! I layer, pin, then flip the whole thing over to make sure it's all smooth on the back side, doing adjustments where needed. It's probably not the best way to do this, but it's what I have available.
I also just discovered a 2 1/2' x 4' hanging cork board in the garage and have confiscated it! haha DH said he wasn't using it, so it is about to get covered with felt and hung on the wall behind my ironing board where I can easily access it for a design wall.
I guess we all just have to make do with what we're lucky enough to have and call it good. Sometimes I get frustrated with what I DON'T have because we've downsized since retiring, (several times!) and are now in a 1200 sq ft one story condo. I miss all my space, but have figured it out here and it works ok. As long as I can keep sewing and have a place to do it I'm happy...how much space, my own room, etc, just isn't important.