Did you observe the 2017 survey?

I believe they will only sample a very small portion of the total lake area. (I am not an expert, but have watched our State guys doing surveys on large reservoirs.)

I think it is more important to be flexible on the date to make sure you are sampling under conditions that are close to optimal. If you get a big rain in your watershed two days before the scheduled date, the lake will be muddy and way up the banks. The fish will also be moved out of their normal environments - which is where the samplers know to go shock.

P.S. We do have a couple of electroshock experts on the forum. If you don't hear from any of them in a few months, then you might make another entry to bump this post to the top again. For the cost of a survey, you definitely want to make sure it is done right.