Tom,
At one time I had four agents, and a couple provided me with a fair number of jobs during the first year or so. However, I always told them that I really didn't care what they charged the client--my fee for my services was for me and he or she could tack on their charges to the client's bill.
I also refused to sign any agreement with the agents that would not allow that customer to book me in the future without going through the agent. Of course there was a reasonable time frame of one year for this clause in their contracts. In your situation, especially living in an area that relies heavily on tourism, an agent or two might be a good option for becoming established.
Good Luck,
Gary
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Travlin' Easy
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