In the field of cultural heritage, there is a continual demand for effective ways to present digitized artifacts in 2D, 3D, and even 4D. Recent advancements in mobile mixed reality (MR) headsets, featuring improved rendering capabilities, enhanced spatial computing, and greater immersion, make it an ideal platform for the immersive presentation of cultural heritage content, reflecting traditional real-world exhibitions and paving the way for MR-based exhibitions. However, such MR exhibitions rely on the latest MR head mounted display (HMD) techniques, which are just emerging. Current software typically supports only the basic functionality needed to engage visitors and present MR content, and is not yet fully capable of assisting curators in engaged management of the different stages, including curation, hosting, and evaluation. At the same time, in-situ methods, including in-situ visualization, analysis, as well as authoring, have gained significant attention in recent years, due to their emphasis on intuitiveness, immersion, and contextualization. This work begins by outlining the key stages for creating a mixed reality exhibition and identifying the desired feature sets, which are classified as either technical-centric or user-centric. We subsequently investigate the application of in-situ methods to support the realization of user-centric features. A functioning software system is developed based on the concepts. We plan to release it to benefit the research field. To get the first impression of the system, we constructed and delivered an exemplary puppetry exhibition with two sessions, each lasting over 40 minutes, involving more than 15 experts in total.