An interesting option for Druid 20 is to play a Sidhe Scholar, from Dragon 339. It will drop your hit die from a d8 to d6, and make your Wild Shape form seem 'otherwordly', that is, it makes you unable to blend in with other animal forms. In addition, your animal companion starts off with an attitude of unfriendly towards any humanoids who aren't you.
In exchange for these drawbacks, your animal companion gets +1 hit points per HD, +2 Dex and +2 Cha, making it a bit better at fighting than you. You also get Knowledge Arcana as a bonus skill, some bonuses to skill checks for Knowledge (Arcana), Knowledge (Nature), and Survival. You also get the equivalent of the 3.5 Spellcasting Prodigy feat, craft staff, and the ability to eventually add Evil domain spells to your spell list. Since your stats mean you'll be avoiding combat a lot anyway, and you'll be low on spells due to your low Wis score, this tradeoff may well be worth it for you.