Who are going to the dance?
general public, regular dancers or EFDSS level?
beginners need simple dances, regulars prefer more oomph and complication in the sequences and EFDSS don't lift their feet off the ground and after 40 years (average) prefer longer sequences still.
In truth there is smooth spectrum of people but you gotta put the handles somewhere.
Get the type of people "stated" and after that the caller, band, booze, interval etc become an easier choice.

Me? Not too loud and at a pace that you can jump to so no Tickled Pink!!
Bismarks or Captain Swing (own caller) are a good compromise.

For a few ideas join e-ceildh or look on Webfeet (go via cresby.com for the latter and the former is listed on there but e-ceilidh is an e-mail service so not for the casual encounter.