Pig Pregnancy

I have a sow who is pregnant and she has the company of the boar and a castrated boar.  They are outdoor pigs.  I'm thinking that I need to seperate her off from 'the boys' before she gives birth.  She fell pregnant on 14 Feb so it's any day now but I'm not sure which gestation period guide to follow.  Some places say 3 months, 3 weeks, 3 days which makes her due 1 June but others say 112-114 days and that goes to 6-8 June.  I know there's not a great deal of difference between the two dates but as pigs are such social animals and they all sleep cuddled in together, I don't want to cause her days of stress and unhappiness by moving her tomorrow (ready for 1st June) if it's more likely to be the 6th.  Can anyone please share their experience?

back on the farm......farrowing date was always 114 days after initial breeding.  we controlled breeding so we knew exact date.  but on their cards we would write day 112.  that way they would be moved far enuff in advance before their farrowing date.  we would move to farrowing barn on day 111  or so.  hard to remeber all details now.  been to long.  but i would plan a few days inadvance b/c all animals are individuals.  not all follow the "rules" like they should.

if it was I,,,i would seperate her.  and have a farrowing crate of sorts.  this prevents the pigs from getting crushed.  our crates kept the sow from moving anywhere but standing up and laying down.  bars on the side kept her from crushing her pigs.  on dirt operation id say you dont need all this.  but i beleive i would have some sort of set up to seperate her fromt eh boar hog and barrrow you mentioned.

others here with more dirt experience could go into more detail im sure.