If you are planning an exhibition, you need to collect, research, arrange and structure tons of information. Please don't rely on serendipity - it won't all fit together in the end just by chance. Seriously. It won't.
Work with an expert who knows how to deal with large quantities of data time pressure, varying expectations and the frequent transformation of larger projects on their way to realization. It will save you time, energy, money and nerves. Promise.