That sure does look like water droplets.
Oil would not sit in droplet form on the hose because
oil has no surface tension - unlike water. Also, judging by the red/brown colour of the steel AN plug in the inlet manifold, I would say that you have had some condensation at some stage during the winter. What kind of storage system are you using - Carcoon or similar? Does it have a good circulation of air? If not, I would forget the plastic bag and use a decent cotton sheet which will allow the air to circulate freely.