Your hotel should be close to the city centre, i.e. close to the bus station that brings you to caesar. Unforunately there is no adjacent hostel. But here are some hotels that are still available from Wednesday to Friday. And you can find more information here: hotelsinbonn.de
Hotel Astoria
Inhaberin: Frau Mareile Kunz
Hausdorffstrasse 105-113
53129 Bonn
acora Hotel und Wohnen
Westpreußenstrasse 20 - 30
53119 Bonn
Am Römerhof
Römerstraße 20
53111 Bonn
Hotel Europa
Thomas-Mann-Str. 7
53111 Bonn
Deutsches Haus
Kasernenstr. 19-21
53111 Bonn
Hotel Astoria
Inhaberin: Frau Mareile Kunz
Hausdorffstrasse 105-113
53129 Bonn
acora Hotel und Wohnen
Westpreußenstrasse 20 - 30
53119 Bonn
Am Römerhof
Römerstraße 20
53111 Bonn
Hotel Europa
Thomas-Mann-Str. 7
53111 Bonn
Deutsches Haus
Kasernenstr. 19-21
53111 Bonn