I use two 30" x 8' particle board utility tables from office store covered with brown paper for general work.
The are topped with egg crate foam mattress toppers for soft non scratch surface when needed.
When flat is important I lay two solid core door panels on top and shim to level with wood door shims. I check them with a 6' aluminum ruler and 48" bubble level.
They work as an island for all around access, two islands when needed. Can be a big deck with two doors or a huge surface by adding a 3rd door to the end of the first two. Great for sheeting, vacuum bagging, painting, etc etc. Height is 30" (I'm short), good chair height, or ok to stand.
Its modular, moveable, removable, versatile, easy, and cheap.

Tables with foam toppers, one door shimmed level, two doors shimmed level, three doors together
Gary