Camping facilities are available directly on the Main River at the Würzburg Canoe Club https://www.kc-wuerzburg.de/camping/ and at the Kalten Quelle in Würzburg http://www.kalte-quelle.de/.
For campers, there is the possibility of parking directly on the Main, close to the evening concerts, on the Viehmarktplatz. In the meantime, the Würzburger Versorgungs- und Verkehrsgesellschaft (WVV) has also created more parking spaces for motorhomes and more electrical connections. In addition, there is a fresh water supply and waste water disposal at a central location as well as a toilet facility.
More information on this can be found at: https://www.wuerzburg.de/tourismus/unterkunft-buchen/camping-und-wohnmobile/517586.Camping.html?detID=500166.