Late to the party sir, I thought I had replied earlier

!
That convention table looks so good

and as you say: a pretty table is vital to draw people in.
As for random spawning points, I've found the CRZ method very useful: mark the centre of the board, roll D10+3, that's the number of inches out from the centre and the point of the die indicates in which direction you spawn the zed.
I even used it in my weird west game for generating baddies. VERY unpredictable even though every vampire group seemed to mysteriously always spawn in nearly the same spot by the undertaker

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Regards,
Legionnaire.