I’m with @Muppet with the amp modeller/preamp IEM route but if that’s too big a change (although by far the best weight wise) you could get yourself an amp modeller/preamp + FRFR cab set up so you do still have a cab on stage. This is my entire set up now and my back thanks me...
Sorry to interrupt the hilarity you cheeky scamps but can I just ask @jebroad is this Bash confirmed for certain, as in hall booked etc.? Only checking because I want to book a hotel for the evening before so I don't have to do a round trip on the day.
@Jabba_the_gut don’t let me leave the SW Bash without me trying one of your shorties, I’m thinking one of those might be my second purchase from you (before you become my personal luthier).