Focusing on the narrow issue of the warrants, I can understand the frustration. I deal with government searches & seizures, the grand jury process and other government investigations. It is often shrouded in secrecy, leaves targets at the mercy of the prosecutor -- sometimes for years -- and can be particularly frustrating when the government refuses to share basic details about the basis of its investigation.
That said, the government's motivation for secrecy is not all hot air. As we can imagination, if the government provides too many details about the nature of its investigation, where it's headed, what it knows and what it still needs, the target can easily frustrate those efforts by destroying evidence, etc. The prosecutor is certainly not going to provide that evidence to a legislator who is not a part of the investigation, nor should a legislator interfere with an investigation. (Once the government brings charges, then the target and his lawyer have greater access to such evidence.)
If the watermen have concerns (and I don't blame them for wanting to know whether the gps devices were properly planted under the scope of the warrant), then the proper method is for the targets -- not anyone else -- to challenge the search in court. If they can't afford a lawyer, then they could contact the ACLU or similar legal services providers.
Jeff
"Modern Society will find no solution to the ecological problem unless it takes a serious look at its lifestyles." -- Pope John Paul II