I see the same thing on lake winnipesauki...... their storage sheds are better/bigger  than my house....they have care takers watch the property in the summer and winter...every once and awhile... they might stay there in the winter when they lower their standards and ski new hampshire instead of Aspen or Switzerland...I get the pleasure of waking them up  with my auger( always after 7 

)... one year  had a woman come and tell me I couldn't fish out in front of her house... the reason .. she wanted to use her out door  hot tub.. and I was disturbing her privacy..  my guess her mid winter romp was probably not with her husband...BTW.. i stayed put... she called the police.. they sent the wardens.. the wardens checked our licenses and told us to have a nice day...