I have been trying to do this for years and now have a GoPro to make job easier. At work I have a pond being managed to stay clear for Black Crappie and a field site may actually have Flier nests in a location I can get to and that is also naturally clear this year (for once). Being a biggin, I need some sort of float that will enable to cruise water surface with mask and snorkel while creating minimal disturbance as floating about. I have some nice styro-foam insulation sheets that may be suitable for the task.