For members offering services to tourists there are two websites where you can and should be advertising: The Maine Office of Tourism: www.visitmaine.com and Downeast Acadia Regional Tourism (DART): www.downeastacadia.com. Both of these websites are supported by lodgings taxes so there are no additional costs to you. You can set up your own account by clicking on the Tourism Partners button at the bottom of the page on the State sight and the Members button at the bottom of the page on the regional site. Both sites use the same database, so setting up one account should automatically give you a presence in both locations. The listings are verified separately however, so new listings and changes may not appear at the same time on both sites.
I'd be happy to help anyone with getting started. Email me at: firstname.lastname@example.org