Make a "wish list" of the amenities you need and those you would prefer to make the most of your time in Concan. Is it more important to you to be on the water or to be peacefully secluded? How many people will be in your party? Do you require handicapped access? Define your ideal cabin in as much detail as possible.
Click on "cabins" on one of the websites that offer lodging directories of Concan. Open a word processor document on your computer so that you can cut and paste important information such as rates and amenities into a master list.
Call each of your top three choices and find out what the atmosphere is likely to be during the time you plan to visit. Do they cater mainly to families? Students on spring break? Young professionals? Motorcycle riders? Ask any questions the website may not have answered. Find out how far in advance it is necessary to make a reservation.
Make your reservation either online or by phone. You will need a credit card; most places require a deposit.