Gull droppings remain the only constant, pockets of

Oh, for a life on the beach! Where the clean fresh air invigorates; where each morning, the shore, washed clean overnight by the tide, looks wonderfully new; where acquantances meet on the sand, become inseperable companions for a few heady hours, and are then lost forever at going-home time...and the rich aroma of salt, fish and gull droppings remain the only constant.
If you have often wished for this, try Devbagh, where pockets of floating clouds loom whichever way you look... and the wind propels the sand in a horizontal direction, somewhat in harmony with the swaying of the casuarinas.
Devbagh is a tiny island off the west coast near Karwar in the Uttara Kannada district of Karnataka, which has one of India's largest untouched forests and miles of pristine ivory beaches. Hemmed in by the ghats on the east and the Arabian Sea on the west, as a seaside town Karwar offers varied opportunities for the tourist. For a relaxed holiday spent in solitude, however, undoubtedly head for Devbagh, a small island near the confluehnce of the Kali River and the sea. Devbagh, which literally means "God's own garden", is a 20-minute boat ride from Karwar. Apart from Devbagh, Karwar's other claim to fame is the Seabird Project, the biggest naval base in the whole of Asia. The Rs. 36,000 crore project will turn Karwar and its beautiful locales into an importance centre for the country.
Could you please explain to me the emboldened parts?

I know "gull" is a sea bird and "dropping" is faeces of those birds, but no idea what "gull droppings remain the only constant" could mean. Similarly, "a pockets of" as well.