My cutting table is 4ftx6ft and I spray baste on top of it.
I have another 2ftx6ft table that I can add on if I need it bigger.
A big saver for backs is to have your table on bed risers (whether for cutting or spray basting).
The pool noodle method for spray basting intrigues me ....
https://www.youtube.com/watch?v=XCIdv6iwLeQ
Oodles more of noodle links to check out if you ask Mr. Google.