Plastic bags or bowls of water?

[santasaltire]

I have decided that i will prep the veg for Christmas the day before. I don't often do it, as DH and i usually get through it pretty quick in the morning.
My MIL says i should soak them in bowls of water, my mum says in plastic bags in the fridge.
so, who is right?

Plastic bags for carrots / sprouts.

Water for spuds or they will go brown, probably ditto for parsnips.

peeled potatoes definitely soak in water. they will go black otherwise.

i do bowls of water for everything, esp as the fridge will be so full of food!

I was worried that if i soaked the sprouts inw ater they would become water logged?
Will end up not doing it as i'll have started on the wine by then to cope wth MIL