Oh, and Nightfall (et al)...here is the dragon's stats...I used the Draconomicon (and MaOF for that matter) extensively, but maybe you have some better ideas...
(Yes, he does have too much treasure..thats intentional)
Dramo Tarteri, Adult Tarterian Dragon
Str: 36 Dex: 10 Con 24 Int 20 Wis 21 Cha 20
HD: 21d12+162 (317)
Base Attack/Grapple: +24/+46
Attack: +36
Fort/Ref/Will: 22/16/19
Breath Weapon:13d8 (DC27) (Line 100, Cone 50)
SR: 25
Move: 60, Fly 150 (poor)
Init +0
AC: 34 (10-2size+22NA+4 Armor) (37 w/ss)
Abilities: Force Res (+4saves), Strength of Will (+4 saves v compulsion spells), Freedom of Movement, DR 10/magic, Otiluke’s Resilient Sphere (1/day), Alternate Form (Human), Dragon Senses
Spells Known: 8/5/3/2/1
0
1: Breath Flare, Charm Person, Expeditious Retreat, Change Self, Magic Missile
2: Mesmerizing Glare, Wings of Air
3: Hold Person, Gaseous Form, Dispel Magic
4: Improved Invisibility
Spells per day: 8/7/7/6/4
Feats(8): Multiattack, Hover, Rapidstrike, Improved Rapidstrike, Flyby Attack, Power Attack, Shape Breath(MB+1), Clinging Breath(MB+1)
Attacks: +36 Bite (2d8+13), +34/+34/+29/+24 2 claws (2d6+7), +34/+34 2wings (1d8+7), +34 Tail Slap (2d6+19), all +2d6
Attax(Human): +36/+36/+31/+26 4d6+13
Items: Amulet of Health +2, (4k) Belt of Str +2 (4k), Ring of Mage Armor (4k), 2 Blast Globes (8k each), Bracers of Striking +1 Flaming Shocking (18k), Ring of the Darkhidden (6.7k), Rod of Viscid Globs (6k), Ring of Mind Shielding (8k), Ring of Protection +1 (2k), Spider Rod (40k)
Skill Points: 232
Hide: +24 (24r), Move Silently: +24 (24r), Spot: +29 (24r), Listen: +29 (24r), Jump: +37 (24r), Spellcraft: +29 (24r), Bluff: +29 (24r), Sense Motives: +29 (24r), Concentration: +18 (11r), Diplomacy: +29 (24r), Disguise +18 (12r), Ride +20 (20r), Swim +20 (12r), Tumble +15 (15r)