Also, if your DM is building a campaign with an Undead Hunter type theme, allow me to make some additional recommendations.
1. Once Cleric is Good, Two is Better. Be sure to have at least one cleric in the party specially built for Turning/Destroying Undead. If possible, try to have two clerics with the other being a little more generic or combat oriented.
2. Blunt Weapons are Your Friend. Seriously. I cannot stress this point enough.
3. Don't ignore the Ranged aspect. Most would be inclined to deplore ranged tactics against undead (many being resistant to piercing damage) but with the proper weapons, ranged attacks are the best way of keeping large numbers of undead at bay. Many of an undead's nastiest abilites are based off of touch attacks, so don't let them get too close. Bows/Crossbows with Ghost Touch and Baned against Undead are invaluable.
4. Tactics, Tactis and more Tactics. This goes hand in hand with number 3, but I'll reiterate it here. The best way to fight undead isn't necessarily the "Charge & Slaughter" method. Be sneaky, use fortified positions. Let them come to you and fight on your terms. Use Hallow and Concecrate spells/effects to maximize your advantages. Never give a large group of undead, especially incorporeal undead, a chance to surround you.