Get some Gorgeous Guineas Shampoo, loads of lovely ones Posh & Go for long fur , Cedar and Lemon grass (I used for bonding as it was a stronger scent to make them all smell the same
Wash the fleeces in a neutral detergent , no conditioner , I used Ecover or similar
Put some newspaper or puppy pads under the fleece to absorb
One of our sows peed blood and it was apparent on the puppy pad (she went to the vet the same day )
Unless you're planning to show them I'd keep the hair trimmed round the rump , I do feel sorry for the very long haired piggies dragging all that fur about .
Are their claws in good nick?
Are they a bit tubby ?
Do they drink enough?
Are they active or are they sitting in one place , peeing and poohing ?
It'll take a while to settle them , they'll be nervous wee souls .
Do you know if their previous owners used anything on the fur (though I cannnot think of anything that smells like meat crisps )
Bear in mind , sows go into season especially when you have a boar and neutered boars can still at "boary" .My sows were always within a day of each other going into season, it lasted 36 hours but they were evil and their pee smelled ! They can pee horizontally behind them which is a good defence against a rumblestrutting boar 
Washing them -
Extra pair of hands if you can
Get everything ready and in reach
We did them in the bath , put a towel inside so they don't slip , pour in enough warm water but shallow enough keep their heads and mouths clear of it
Plastic jug to sluice over water
Filled the sink with warm water in case we needed more clean
Dilute some shampoo in another plastic jug or cup
Couple of clean towels to wrap them
They can jump (little toads)
and will pee/pooh in their clean bathwater
We did pop one in the bath , sluice with water , lift out , shampoo, lather , rinse .well, towel wrap . If you put one hand under the belly and your forefinger and middle finger through their front legs and your thumb round the side you can keep them secure
We did use a very low heat hairdryer and kept my hand in the fur to fluff it and I coud feel how warm . Keep it moving .
Once they were dry we put them in a box of hay to relax .
Then deal with the sulking piggies and the water everywhere !
Our coarse coated boars ( Rex and Teddy) were bone dry as soon as they had a quick towel rub ! Gore Tex Fur
And photos will be required , obvs .
Pigtures !