I've seen some people take up half the changing room all to themselves, while others seem keen to get changed right on top of your toes. (fitnessandpower.com)
Kayak Tours Sunscreen, hat, camera in case or zip - loc, shoes that protect top of toes. (staugustineecotours.com)
Hold the soles of the big toe using a three finger grip [Thumb resting on top of the toe and middle and index fingers beneath the toe.] (yogicwayoflife.com)