1 - Munivar really means ascetic. Here it appears as merely a conventional literary device, "wishful hyperbolism", as it may be called. As may be seen from the contents, these rules are intended for ordinary people who have not much to do with asceticism.
2 - As is already explained above, it is necessary to distinguish between ghat = jamat (jama'at) assembly for prayer, and ghat bathing place. The vessel containing the blessed water at the prayer assembly is eulogistically called ghat-Ganga i.e. religiously as efficacious as the Ganges.