[Avodah] Yaakov's division of his family into two camps

[Moshe Yehuda Gluck]

R' Elchanan Schulgasser:
Does anyone know how Yaakov Avinu divided his family before his encounter
with Eisav? I looked around a bit but couldn't find anyone who addresses
this specific question (although there's an intriguing Ohr HaChaim HaKadosh
which explains that he armed one camp and left one unarmed, ibid.) 
<snip>

To add to the question, it seems that when Eisav finally did arrive,
Ya'akov's whole family was there to greet him. What, then, was the point of
dividing them earlier?

KT,
MYG