Having extracted I now have supers that are still a little wet with honey .
Should I store thes wet or put back to the bees to hopefully clean / dry them of. If back to the bees top or bottom of BB?
Back to OP query.
Should I store these wet or put back to the bees to hopefully clean/dry them off.
Your choice, as ever. Usually later extracted frames are stored 'wet'. The idea is that they are less likely to be attacked by waxmoth. I have normally stored mine dry.
top or bottom of BB?
Again, either. Under will not get further nectar stored, usually. Over - as most have said a day or two above the crownboard - but they can be used for storage if there is a flow on and not too much room elsewhere... Any granulated honey will not be moved so quickly (one clear advantage of putting them under the BB) and often the bees may find it easier to add to honey remais, rather than moving it. Under the brood is more work.
The issues of which supers go back where is one of choice, yet again. I try to separate apiary sites but within the apiary, I may be doing other manipulations, which may largely negate any segregation. If there is known to be brood diseases (or nosema) in the area that would be a much higher priority.
For the odd super, freezing at freezer temps for a couple of days and pallet wrapping should be adequate for the winter - but remember mice can chew through that stuff with relative ease! Same with bin bags, but not my favourite as not easy to see they are OK.
I would generally prefer stored dry and stacked in a tightly sealed column of boxes. I can then regularly 'sulphur candle' them all, or fumigate with ethanoic acid (nosema and some wax moth control). I usually pull them tightly together with ratchet straps and tape/plug any non-snug joints/gaps before fumigating.
Certan spraying is another alternative, but I found that fiddly, expensive and a bit 'uncerta(i)n'.
Hope that helps.
RAB