The comments regarding your wife are clearly unprofessional, but they have nothing to do with your alleged trespassing, and so the comments would not help you to get the citation thrown out. Your recourse there is to do exactly what you already did, which is to complain to the chief and ask that the chief take action against the officer.
I'm also sorry to say that the missing date on your citation would not be a way to get the citation thrown out either because, again, it has nothing to do with the alleged trespassing. If you were not aware of the hearing, and you missed it and were found guilty, then the missing date on your citation would certainly be justification to have the judgment against you vacated and a new hearing date set ... but that's not an issue anymore since you now know of the upcoming court date. The bot***** *****ne is that when you are in court defending yourself for trespassing, I don't think that the judge will care at all that the citation handed to you at the time did not have a court date. The judge will likely say "well, you're here now, so let's talk about these charges."
So, unfortunately, those technicalities will not likely help your case. You will probably need to rely on a substantive argument, such as the fact that there weren't any "No Trespassing" signs, and that therefore you had no idea that you were trespassing.
I am truly sorry that my answer may be bad news for you, but please understand that it would be unfair to you (and unprofessional of me) to provide you with anything less than an honest response. However, if your concerns were not satisfactorily addressed, then please let me know, and I will be happy to clarify my answer.