The conference centre is easily accessible from the city centre. There are multiple lodging options at varying price ranges available in Gothenburg.
There are two hotels that are within walking distance from the Conference centre.
Radisson Blue Riverside Hotel (1 minute walk)
Clarion Hotel The Pier (10 minute walk)
Other options require some travel by bus or ferry.
Comfort Hotel Goteborg (very close to to the ferry on the city side)
Hotel Riverton (very close to to the ferry on the city side)