If you choose a supplier with good feedback and knowledge of their ingredients, your journey into making bath and body products will be all the more wonderful! Develop a relationship with the vendor - get to know their recipes and talk to them about suggested ingredients. I'm so lucky to have a number of great vendors local to me, and I feel I've learned so much from their advice and suggested uses for new or novel ingredients.
Check out the lists of suppliers in the FAQ (look to your right under links to lists!) for your geographic area.
And for no reason, here's a picture from last night's Simpsons showing my two favourite shows colliding! Hodor!