Hey FisherGirl -
I use simple surf booties...something similar to those in the link below...but got mine for $30 in Hawaii where these are very popular for people walking and fishing on sharp lava rocks covered in slippery algae...basically function the same as the Simms and Orvis...but at half the price.
http://www.amazon.co...f=pd_sbs_shoe_4
These are also available at MEC $35, and I use them in the pontoon boat or float-tube inside my flippers (in warm water). They are OK for getting out onto shore for lunch, but I wouldn't wan to wade in them - they offer no arch support and soles are thin; you feel every stone and your foot flexes way too much, IMO.
could just go with a pair of neoprene socks and your regular wading boots
I agree with this suggestion. Non-slip, safe from ankle scrapes and jammed toes - that's why they make wading boots the way they do! Here are the socks.
Never, never, never. A number of years ago I was lining a canoe up a very shallow riffle, so took off my runners to keep them dry and waded in bare feet. Slipped and jammed my foot forward into a rock - didn't even fall down. Broken 2nd toe which now, 20 years later, is arthritic and moving sideways. Get those toes inside some protection - and as well keep your feet from getting cut on sharp objects in the water - ever had a little stick jab you in the instep?