Completely agree. You give a shit about your kids and your family, and from your posts here it sounds like you're doing a bloody amazing job at keeping the show on the road in some trying circumstances.
I don't have advice on how to make things better or easier, I'm still working out this parenting gig for myself and my son is only four-and-a-half going-on-thirty, but I know that you've got this, you rock.
We did this for my mother in law who previously used our account. They receive an email asking them to set their own password and then log in with their own credentials, you never need to share yours.
Oh man I'm not entirely sure, but you've just unlocked an awesome memory of when I saw Powderfinger/Something for Kate/Stella One Eleven at the Coogee Bay Hotel in Sydney back in '99 - one of my all time fave gigs to this day.
EDIT: Maybe you mean the Livid Festivals in 2002/2003? Powderfinger & SFK did 2002, Shihad 2003. Wasn't at the Showgrounds though. From what I can see, Powderfinger have only ever played there as part of BDO, nothing else.
I'm more intrigued as to why you have multiple high-speed watercraft in your house...
(Sorry couldn't resist - downvote as appropriate...) :|