personally I don't fish commercials, the only day ticket waters I've been to recently are sandhurst and Cromwell, neither of which are local to the area, if you're going to pay day ticket rates you might as well head south, at least the waters down there offer 30's for the top dollar you pay, up here the prices charged compared to the size of fish available makes our commercials a complete rip off
managing expectations is quite right, I'm Wirral based and I've fished in Cheshire since 1996, funnily enough I started travelling out there to catch bigger carp, 20's and possibly a 30?, in the 21 years since I started trying for one, I still haven't had a Cheshire 30, I fish a session near enough every week right throughout the year, my average over the years is around 3x20's a season, sometimes I have more, others i'll catch less but most of those 20's are under 23lb
regarding expectations, catching a fish of 25lb+ in our region isn't impossible, some always get lucky but for most of us, a target like that requires time and dedication, the magazines might make it look an easy task but its far from it