How heavy is your anchor? I vaguely remember you saying somewhere that its only a pound, is that really enough to hold you?
I usually wedge it inbetween rocks. Its heavy enough to anchor the float. We usually make special anchors for our floats by pouring 1 lb of lead in a stainless fishing pole butt. Ill see if I can find a pic.
I wouldnt want to use a weight heavier than that as it would be a pain to carry around.