we just got back from panel today.
Panel in our area was a group of people ( chairperson, councillor, foster carer, nurse, social workers, and trainee and secretary) sitting round a table and we sat facing them.
Bit daunting at first, but all were very friendly.
They asked us a couple of questions each - mainly about how we thought fostering would affect our daughter.
Then they told us we had been accepted! (Yeah!) and then explained their reasons as to why they'd reached that decision.
My DH wore smart trousers and shirt, I wore polo jumper and skirt.
You sound like you have had a lot of preparation - you should get/have already got your "this is your life" book copy of your application panel - if it is like ours it will be hugely detailed and have everything about your life/work/beliefs (weird reading about yourself like that!)
GOOD LUCK and hope this helps.
IMO a lot depends on the social worker/other professional preparing your file - if they have done a thorough job your acceptance will almost be a "given" - if not, you might face at panel some of the questions that should have been asked earlier.....which would not be so pleasant. If there are any gaps in your life story, the panel WILL ask. Better to have them explained in your application than to try and explain yourself on the spot to a group of 8 or so strangers.........