In any Pagan path, the ideal goal is to renew practices of the past in the present time. There is no real way to completely bring back traditions of primitive times (humanity primarily exists in a technological age, for instance), short of going off the grid and living in the wilderness.
It is fine to honor Pagans of the past while living in the present. Nature abounds, and it can always be accessed; energies exist everywhere. Bear in mind, however, that primitive cultures often practiced what would be considered barbaric acts (including human sacrifice); deities understood back in the day, that the human race was fairly young, and were not educated enough to know better. In other words, your patron/patroness will perfectly understand if you don’t resort to primitive barbaric measures to achieve spells and rituals!
Sadly, I’ve borne witness to conflict among modern Pagans of various paths who seem to have a ‘purist’ attitude regarding their practices; as aforementioned, there is no way to fully revive the ‘old ways’; honor the positive aspects of the past, but learn and grow in the present.
My patron deity is the Norse God Loki; I am not a ‘modern Viking’, so much as a Pagan who is drawn to the Nordic Path (though I also have Celtic roots). Many Vikings were warriors and raiders (the lower class were often forced into servitude) but many more were craft-makers and tradespeople. I have no desire to bring back bloodshed! As an artist, the creative aspect of this primitive culture seems to be my greatest calling.
Another positive aspect of Viking culture: Diversity. As travelers, they encountered all classes of person, which is compatible with my eclectic Paganism.
As with anything else, focusing on the positive is the best approach. If you strive for ‘purity’ or ‘perfection’ in Paganism, you will never find it. Connect as much as possible with the past, but improve yourself in the present.