Be sure to get someone professional (like an experienced AT Controller)
on a good radio with good signal strength etc to monitor and sequence
of all incoming and departing traffic. A temporary tower is good but
be sure he knows the field and any runway limitations. Have someone
monitoring any more normal Unicom frequencies to steer everyone to the
right CTAF.

At the annual SSQ flyin we have a spare CTAF receiver connected to the
PA system at low levels so the public can hear what's happening. Have
a PA system so pilots can be paged if necessary.

Use wing walkers on all A/C taxiing around general public areas. A
separate (and posted) ground frequency is good too.