It's not that women couldn't last with men as women were known to ride and fight with the men among groups as the Scythians and Sarmatians, and were feared by powerful nations that clashed with them. Even when ignoring the leaders who presumably led through political power and/or charisma (such as Boudicca, Joan of Arc, etc) and left the heavy fighting to men, those who acted as spies and guerrillas (and thus not a contest of strength), and also mere legends or after guns & technology help level the battlefield, there were still women like
Jeanee Hachette.
So the reason I have doubts about a Viking bringing his wife (granted, there are always anomalies) is because of tradition, superstition, one woman on a shipload of men is begging for trouble (especially if say her husband died), women typically had children to care for, and the fact that women have much better sense than men. Ok, to be fair, men have always been encouraged to hunt & provide, and I can see how easily that evolved into raiding, whereas women were more domestic and centered around children which in turn discouraged raiding and going on offensives, though I prefer to think of it as women having more sense (at least in this regard), especially in the ancient world...and I do wonder how many left also to get away from their women who were said to have an attitude, expert schemers, and mistreating a woman (including a wife) could get her kin after you quick.
Nevertheless, women were sometimes feared more than men in battle (one of the Roman historians said there was mixed feelings when defeat of barbarians was at hand so that the women joined the battle because that meant victory was almost assured but the women fought even more vicious which drove their menfolk to fight more viciously in turn). Heck,
Blenda organized women in massacring a bunch of idiotic Vikings that attacked their village while their own menfolk were away fighting someone else. (As for Scythians & Sarmations, they were semi-nomadic with horses an important component of their society so the home moved with the raiding parties sometimes and that's why I think their women sometimes joined in offensives with their men as well as even more likely to join in defensive action, though I bet it was the women that encouraged archery, including the use, so it was plausibly said, of poisoned arrows. One of the accounts of King Darius seeking to fight one of those groups also described their women as avid hunters on horseback as well.)
But overall I am curious about the odd account of someone bringing his wife as it sounds most strange...but people do strange things all the time so I'm willing to entertain the notion, even if it is the History channel saying it (they don't have the best reputation with me).