Hope that lake doesn’t have any breezes or gusts.

… Also, assuming you just did the calc for neutralizing the weight of said person…

Even if there was no wind… they could not walk.

Walking requires weight to work.

A surface you can push off of.

It seems like the picture shows one guy with walking sticks, which I guess might kinda work if the lake is less than about 2 or 3 feet, or under a meter deep… not too many lakes like that.

Maybe something like stilts… or … huge snowshoe/flipper type things… might work?