It is far better to have too much of this type of information than not enough. Just a table of dates and numbers counted is sufficient. However, a bar graph with dates on the horizontal axis and numbers counted on the vertical axis is much more eye-catching. Reference to this type of graph can show if a species is single or double brooded. Over a period of several years, valuable information can be gained about peak flight periods, and variation in numbers from year to year.
Research is worthless unless it is communicated.
Most park managers are glad to have such information. They are often not trained in entomology and usually do not have the time to do this kind of research. I have found that park managers welcome anything that will help them answer questions from the public. Most entomological societies have newsletters where members can get their results into the public domain. One never knows when the information they have contributed will be just the piece needed to answer some larger question.