What is the playa like? Its very beautiful. It can be very hot in the day, very cold at night sometimes, & yes, it is intensely drying. Bring lotions, & lip balms; maybe some travel sizes to carry (and give away). Lemon juice or vinegar spritzed on the skin can also help counteract the alkali dust between showers. Your cuticles will be a bit shredded after a day or two, Liquid Bandage helps seal cuticles and cuts.
People do tend to like handcrafted jewelry, especially with the 'Man symbol & the year on it. (That said, one of my favorite jewelry gifts in 2010 did not have a Burning Man theme--was a white & pink heart-beaded bracelet with letters spelling out something naughty.) Do not feel that you have to gift everyone. Do it when you connect with someone, & don't do it as a trade.
The more reading you do before asking, the kinder ePlaya tends be in answering questions. So read the Survival Guide and First Timer's Guide I've linked below--it will help a lot.