My oldest VV1 tribe runs alone since a long time. Sometimes, I go watching it and it seems to go well! The population varies up and down and when it's too low, I select some girls in parenting (there is no limit of age in VV1
) I also select some healers time to time.
I think you may do the same and let it go! For VV2, it's more difficult because you must take care of the fire or the villagers get sick and die; but for VV1 you can let them live their own life!!