Don't fall for the "dealer must perform all maintenance for the warranty to be valid" crap. If you are capable of performing your routine service, and properly document the work and save receipts from the parts, you will be fine.
If you come to something you aren't comfortable with, than have the dealer do it. But the easy stuff almost anyone can pull off, like oil/filter service, fuel filters, etc.
All this coming from a guy that owns a repair shop. But there are plenty of folks that choose to have their service and repair handled by a shop to keep us busy.