The trick to pre board is to volunteer to take a wheelchair down. This works even if you are sitting in the back. They don’t have the ”special squad” we have at UA to move their wheel chairs around, so they get gate agents and a few volunteer pilots to do it. CAUTION - there’s always a liability involved whenever you touch a wheelchair (which is something I was taught early at CAL) as you have no protection if something goes wrong. This is why you don’t see pilots at UAL help with a wheel chair. But, you can roll the dice at SWA to get down early. I’ve done this myself a few times.