Best way to add new fields

Hello,

I will be using Fernan82 mod to use the permissions system in WWF to secure my members area.

But, I will need many more fields for my members in this area. There are not a lot of members, only the NGO founders and coleagues.

So, what's the best:

1- use another DB and put them there manually?

2- create another table in WWF to do this and link it with tblAuthor?

3- create the extra fields in tblAuthor?

I don't want to add many fields in the tblAuthor table of WWF because 95% of my visitors would not use them and I think my DB would be much bigger with a lot of deadweigth from 95% of the users.

Thanks people!