I can talk to a couple of friends about bringing their hacked versions with all the songs. If there are multiple StepMania setups next year, I can set up 1 with DDR Extreme and earlier songs and settings (30% D, 50% C, 65% B, 80% A, 93% AA, 100% AAA), 1 with SuperNOVA/SuperNOVA2 songs and modified SuperNOVA2 settings (50% D, 70% C, 80% B, 90% A, 95% AA, 99% AAA, 100% AAAA, M211/P10/G8/Go4/B0/M-4/OK5/NG-5*), and 1 with ITG1-3 songs (those available to me, anyway) and ITG settings.
If I do bring a cabinet, it will be using StepMania v3.9 j6/l4, custom theme, Extreme scoring, Marvs on, free play, 2 songs + Extra Stage**, with a songlist of really just any songs I have.
* The scoring system Konami has for SN2 is hard to replicate and very broken, as it requires you to actually do better scorewise on harder songs than easier songs. The scoring system I have is effectively the same as DDR Extreme's, but boos don't count against you, misses only count 4 against you rather than 6.
** These settings may be modified by time of day and usage.