Player character managment

[Alkenix]

I have lots of source books for 5e.. Can I create a character with all my books and use it in an campagne gm'ed by a friend who has no source books?

[Zacchaeus]

I have lots of source books for 5e.. Can I create a character with all my books and use it in an campagne gm'ed by a friend who has no source books?

You can. Export your character out of manage characters and import it into your DMs campaign. You can also create the character in the DMs campaign. When you join the DM they will see what modules you have in their module activation screen and can allow you to use those modules in their campaign. No-one else including the DM will be able to use those modules - only you.