Job seekers sometimes shy away from accepting a seasonal employment opportunity because it is generally short-lived and not usually in their field of interest. My advice is to reconsider. Many times these "temporary" jobs can lead to a full-time position with the company if you perform at a high level. Consider these opportunities a chance to audition your skills.
Also keep in mind that many of these jobs work with the public, and you never know who you may meet. Every contact is a potential lead to the position you are seeking. Everyone remembers competent, helpful, and likeable employees they meet. One of these contacts just may be looking for someone to fill an open position!