The conference hotels are Hotel Plaza, Østre Stationsvej 32, 5000 Odense C http://millinghotels.dk/hoteller/hotel-plaza/?lang=en and CabInn Odense, Østre Stationsvej 7-9, 5000 Odense C https://www.cabinn.com/en/hotel/cabinn-odense-hotel
Both of the hotels within walking distance of the Odense train station.
The conference venue is on the main University of Southern Denmark campus, which is southeast of the city centre. More information will follow on the exact conference room later. http://www.sdu.dk/en/service/vejviser/odense
You can find some information about the local area at the following websites:
Travel between Copenhagen Airport and Odense
The easiest option is to catch the train from Copenhagen Airport to Copenhagen Central Station (København H) and change there for a train to Odense. There are ticket machines at baggage claim in the airport as well as at the exit from the airport to the train platforms. You will find more details on the information boards in Copenhagen Central Station, where there are also members of DSB staff ready and waiting to help.