Might I suggest using the minor or intermediate White Dragon Bloodline Trait from Unearthed Arcana?
Intermediate you "lose" a HD at level 6, but still get to add one level for the purposes of level dependant abilities, though you get no extra abilities, so you still get a +1 CL for your numerical effects, but not for spells/day or spells known. You would gain +2 on Hide checks, Alertness, Str+1, Cold Resistance 5, and White Dragon Affinity +2.
With a minor white dragon bloodline, by level 10, you will have lost no level. You would gain +2 on hide checks, and Alertness.