As with going to see Bob Saget, you never know what side of the Wilders you’re going to get. It could be the family-friendly Winfield version of the Wilders — jokingly referred to by the band as “the Milders” — playing gospel songs on a Sunday morning and teetotaling their way to a decent paycheck. Or it could be the wilder version, cracking jokes about sex and drugs and other things of which stand-up Saget would approve. The tireless roots act will wear both hats this week, starting with a too-hot-for-prime-time show Friday at Davey’s Uptown and winding down with a Burl Ives-approved holiday show Saturday at Liberty Hall. Arrive early because both incarnations are sure to draw a full house.