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There is a shopping centre which has a supermarket with some produce and baked goods, take-away restaurants, gift shops, newsagents, an ANZ bank and ATM, and a post office.
There is also a petrol station in the resort -- It is NOT open 24 hours. It is advisable to top-up your tank the night before if you plan an early morning departure. There is also a hairdressers that does beauty treatments as well.
Flies in Yulara are seasonal and unpredictable, but when they're out in force, there can be lots. When you first arrive you may laugh at people looking stupid wearing full screens over their hats, but after a day out you may be joining them.