For the Catholic still in me, this is a major time in Catholic life, at least in the traditional approach to Catholicism. The always informative Fish Eaters has the scoop. on some old customs and devotions.
Here's a post I did on the celebrations some years ago.
Given the naked assault on goodness, truth, freedom and the innocent by the party dedicated to the Father of Lies, the destruction of non-conformers, and the slaughter of the innocent, the prayer for St. Michael's protection might be in order at this time:
St. Michael the Archangel, defend us in battle;
be our safeguard against the wickedness and snares of the Devil.
May God rebuke him, we humbly pray,
and do Thou, O Prince of the Heavenly Host, by the power of God,
cast into Hell, Satan and all the other evil spirits,
who wander throughout the world,
seeking the ruin of souls. Amen.