Trustee sales work just fine if you are not there. They are designed to function without the owner.
You used Mahalo? You are not listing a location. Are you in HI?
I am no BK expert. Here is my understanding.
No debts that do not already exist could be wiped out. Hence a bill that comes in later (after the discharge) is likely to be valid.
No debt not listed will be discharged. The creditor was not given a chance to respond so their right to collect is still protected.
We are talking about property taxes. Technically you still own the property. hence you still could have property taxes building. That will happen until the day the title transfers. The property taxes will be unpaid and the bidder at the auction needs to pay them or take a risk that the property will be seized later to settle the taxes.
Be careful about what you do so that you do the right thing. If it is only property taxes then largely you will be OK.
As this is a trustee sale it is likely that the lender can not get a deficiency judgment (by definition a trustee sale precludes deficiency judgments in exchange for a faster process compared to a judicial action).
John Corey