The normal scenarios are not the large, 1,2,or 3 maps. You never need ALL the PAC. The most important are the Sequence of Play, Every Die Roll in the Game, Terrain Effects, Combat Modifiers, and the one with Missile capabilities on one side and Other capabilities on the other. If you got the great neoprene Matt with all the track then that.
So maybe 3’x5’ table.
The monster scenarios in Defence of Frankfurt cover my 4’x8’ table.