What do you think the other Red Hair Pirates were doing during their "timeskip"

We now see that shanks spent 2 years away from his crew just like Luffy did and I bet that why they became such a balanced and powerful crew is because they had this timeskip where Shanks was training with the gods knights. We know he at least had Lucky Roux Yassop and Beckman at this point but where do you think they went during this time?