What are good, inexpensive alternatives to those outrageously priced booties? We already have multiple pairs of good quality wool hiking socks and was planning on using those for starters.
I think you'll find your wool socks will work fine provided they are soft, fairly thick and not constricting.
Based on recommendations from posters on ScubaBoard, I looked for socks with a high content of Merino wool and am very glad I did!
For over a year, I've been using Fox River Trailhead Socks, Style #2097, with 77% Merino Wool, 22% Stretch Nylon, and 1% Spandex. They have a higher percentage of Merino wool than most socks. Merino wool has superfine fibers, which makes it warmer and softer. They typically sell for about $15 a pair, but I bought a pack of 6 pairs of Fox River's "Not Quite Perfect" second quality #2097's for $39, including shipping. I just checked and, unfortunately, there aren't any on eBay right now.
Fox River Mill's Style #2097:
Fox River Socks - Online Store - Outdoor Socks, Trekking Socks, 2097 TRAILHEAD
These softs are very soft, thick, stretchy, and warm. I wear two pairs with loose-fitting boots (Rockboots) and have
very warm feet for well over an hour down to the mid-30F degree water.
I highly recommend Merino wool, so try your hiking socks, as they probably have a high Merino wool content. If your socks and boots aren't constricting, you'll probably be very happy!
Dave C