Thanks for the detailed reply.
Although jail would be one authorized sentence for a trespassing case, the odds of you going to jail are just about zero for a case like this, unless you take the case all the way to trial and lose.
You have two options here, the same as in every other criminal case, and you don't have to make up your mind right away, The first is to fight the criminal case, which you will have to do in order to be able to have a viable suit for a wrongful arrest. The second would be to accept a plea agreement of some kind.
If you choose to fight the case, you'll be able to challenge the warrantless search at a special pre-trial hearing designed to explore and challenge unlawful search and seizure. If you lose the hearing and go on to lose the trial as well -- not saying you will but just painting a picture you can expect that some jail will be likely.
Otherwise, although jail is one type of punishment authorized by this statute, there are other types of sentences as well that do not involve incarceration. For a guarantee that you won't face jail, you'd need a plea agreement. Trials, even in something like this where the facts are not all that harmful to you, are always a crapshoot. Nothing is a slam dunk for either the defense or the prosecution.
All reports, recordings, photos and the like are work product. They are discoverable at the appropriate time, which is not before the case starts. Your lawyer will receive them from the prosecutor as defined by your state's criminal procedure law and he or she can go over all of the evidence with you so that you can make an informed and intelligent decision about your case.
You should have a lawyer for two reasons. The first is because criminal cases can have lifetime repercussions and a lawyer can minimize those. The second is that you want to sue and whatever happens in your criminal case can be used against you in your civil case. The criminal matter has to be handled correctly so that you don't get in your own way in civil court. Anything you say about this incident can be used against you in civil court as an admission against your interest. Anything your lawyer says cannot be.