I know I read somewhere that Chewie has a family, but what I'm unsure of is whether that was in the "legends" EU or current canon...a trip to wookiepedia should solve this question.
ETA:
Ok, this is from the canon section of Chewie's "early life"
Quote:
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Chewbacca hailed from Kashyyyk,[11] a peaceful planet in which he was born one hundred and eighty years before the Clone Wars.[12] He was married to a female named Malla, and had a family to support,[13] including a son named Lumpawaroo.[14]
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And from reading down further it appears his family is still alive, so he does have a family to go back to.