@ChabadShlucha,
Well answered.
“but I’m sure one of the bochurim could fill you in.”
Likkutei Sichos Chelek 29, page 211.
Also see the Frierdiker Rebbes words on this, and how the Mitteler Rebbe was opposed to sleeping in the sukkah, in Sefer HaSichos 5636 – 5710, page 295.
See the old Belzer Minhag of not sleeping in the sukka, (not practiced anymore) in Nittei Gavriel Hilchos Rosh Hashonah Perek 16, Haara 16, quoting the Bulgraya Rav.