Keep your workload down. Do not do 'sign ups' that way lays madness,
(latecomers, fails to turn ups & keeping track) If you must do that,
get a book of raffle tickets & do what the supermarkets do, issue a ticket
when someone asks & say, 'now serving (sorry playing) 443 to 449'
Allow drop ins and drop outs. Some people will (for various reasons)
not stay playing for the full allotted time.
Be prepared to start with less than a full compliment of players. Late
comers can then join in as re-enforcements.
Keep EVERYTHING as simple as possible.
be prepared to Kreigspiel (make things up) 'Sorry, but the Col. wants
their boots cleaned, so they can't advance this turn'
To aid the fun have a series of random events cards. Have both bonuses
as well as penalties. Get all players to dice. Winner gets it if a bonus.
Loser gets it if a penalty.
Have a big jar of (cheap?) sweets. Give them as rewards. The issue of these will add to the fun.
Most of all remember to have fun yourself.