Here's San Luis Obispo's assessment of the mussel situation.

http://www.slocountywater.org/site/Frequent%20Downloads/Quagga%20Mussels/pdf/Quagga%20Mussels%20Summary%203-27-08.pdf

If you don't think there's a bias against bass fishermen, read the section below and note that there is no mention of water skiiers, jet skiiers, or pontoon boats. All of those boats are welcome at Lake Lopez. Ever heard of a wake boat ballast system? .

LOCAL CONCERNS

Lopez Lake and Santa Margarita Lake are at greatest risk during a bass fishing tournament. Bass boats travel from lake to lake competing and can potentially expose our lakes to QMs and their larva.

If a bass boat enters a tournament at a QM infested lake, they could carry the adult mussel or larva to one of our regional lakes.
Out of county boaters are of equal contamination risk (especially if recently visiting Lake Mead, the Colorado River, or any other infected water body).

Vessels docked or stored at non-infested lakes pose very little to no threat of spreading QMs. Also, vessels that are NOT introduced to infested lakes pose little to no threat of spreading QMs.