NOt sure about the Fiesta... but I can definitely recommend the Chateau if you want to save money. The rooms are nice for the price and A TON of spring breakers stay there. Plus, it's right in the heart of the strip... walking distance to Harpoon Harry's, Hooters, Laguna Grill, Coyote Ugly and some big party hotels like Islander, Days Inn, Ramada Inn, etc.
Chateau's Website
Good Luck!