My 10cents,also like to take part in the longer events.
Had a Farr saddle,the best there is,had the last 10 months a power saddle,will change that back to my old Farr saddle.
Bibs,any make with an HP Paris chamois in will take away the sore bum problem by 80%.
https://www.elasticinterface.com/cycling-pads/mtb-trail/
Can have a look there for a specific ultra chamois padding.
Go Cycle has them in their bibshorts and is not expensive.
Previously bought 2 Bibshorts from Privateer,seams came loose after a 360 ride.Contact the owner and he cant fix it so dont even bother buying from them.