Isla Mujeres For a side trip after destination wedding

Sooo we are going to place south of Cancun for a wedding in nov and want to spend a couple/few days in Isla to get away from the hype and gala and family. How easy is it to leave Isla and catch a flight out of Cancun? Where should one stay for a more natural and local beach setting with more local and less tourist food , laid back. Also can one get around the island in a golf cart from north beach hotels?