The clarity is variable, depends on the lake, time of year and turbidity, but I'd say with readings ranging from 10 up to 19 feet on the secchi, it's pretty clear. https://prodoasjava.dnr.wi.gov/swims...ationNo=583064

msriver, I wouldn't call Spider "bad" by any means, I've normally just fished it for muskies and bass. It isn't known for it's walleyes, and we've never fished for crappies. So your mileage may vary, and you could have some success fishing the deeper structure. Find the humps in big Spider (one near the channel mouth coming from little Spider, another south of the point near the strip of islands in the middle of the lake) or the steep drops on the south end of Little Spider. You might have more success there for crappies and walleyes. It's a cool chain, I don't want to discourage you, but the species you are interested in aren't typically talked about for these lakes, and my own experience doesn't include targeting them, but they are definitely there.