This depends on the location.....we do know from a personal perspective that Cape Cod owners use both specific rental companies and real estate companies to take care of their seasonal rental needs.
We will be looking for a 4 bedroom, July or August. Would be happy to consider yours, if large enough and the right location for small children.
The "Eckler Team"
There are a couple of good sites to do on your own, if you want a list of them let me know.
Fees may differ from RE company to RE company so if you go that route, shop around and obviously pay attention to the quality of each rental department.
Listing a seasonal rentals with a real estate agency definitely has its advantage. Real Estate Agents have networks (such as MRMLS in California) and connections that other channels do not have. In addition, you should interview with several different agencies before you decide whom you are going to list the rentals. Interview them for the services they can provide you with, and sometimes you might be surprised to find out the numerous marketing channels Real Estate Professionals have.
Please feel free to let us know if you have any questions.