My wife and kids are going back to her hometown for a week starting today.
My wife is taking our kids to visit her parents from today until next Thursday.
ーMy wife and kids are going back to her hometown for a week starting today.
「今日から１週間、妻と子供達は実家に帰省している」
to go back to one's hometown で「実家に帰省する」と言えます。
ーMy wife is taking our kids to visit her parents from today until next Thursday.
「妻は今日から来週の木曜まで、子供達を連れて帰省している」
to visit one's parents で「帰省する・実家を訪れる」
ご参考まで！
カナダ 
