There's a BIG wedding scheduled Saturday a block from Taylor Swift 's Rhode island mansion ... the question, is it Taylor's big day? Sources with direct knowledge tell TMZ ... a wedding will go down at Ocean House -- a ritzy hotel just a stone's throw from Taylor's digs. Check out the enormous tent that's being constructed on the hotel lawn. We know a permit was issued for the tent. According to the permit, there will be 220 guests. It was issued to "D & G Wedding" ... so whoever took the