I have a small house and the largest two places I have to work are my ironing board and my queen sized bed.
Yes, it makes a challenge but I've adapted. Bed is better than the floor in terms of me bending down/getting up, which I did do for years, move out the furniture and sweep/wash the floor and do my sandwich using cans of stuff to hold down the fabric.
I take off the blankets and pillows and lay out craft paper across the bed (these are the large rolls, three overlapping sheets cover the bed. I use those multiple times, I do replace if they get too much spray baste or otherwise get old but they last about a year. To make things even more difficult, I have the four posts to stick up as well as a foot board. So yes, I have to work in sections. Often I can fit the "narrow" width across my bed, that's a big help.
I used to have a large dining room table, that was nice, it was crib sized just set up and could be expanded. When I worked in offices I had conference rooms. Some people have use of a school or church with those big lunch tables. You can use the drape of the fabric as it goes off the side to help you keep things smooth!
I had long arm access I no longer have access too -- among my various concepts on how to get more of my tops finished I've thought about taking them to a long-arm-er to sandwich/baste, but I'm still too cheap to do that. Still hoping to find a home machine to rent a couple days a month, but with the virus stuff not expecting that to happen this year. So... me and the bed. We can do it!
Edit: I'm a spray baste fan. Going to try glue but haven't yet.