You have the following seat reservations for the lake steamer and train:

09:12am         Depart Lucerne on Wilhelm Tell #CIS2169
13:53pm         Arrive in Bellizona

The landing of the lake steamers are behind the KKK Congress center, just a few steps from the railway station! Please make sure you are on the right boat which usually is a historic lake steamer. It will have a sign "Wilhelm Tell Express" and I recommend to be at the landing 15 minutes before departure. There are no seat assignments on the boat (1st class is on the upper deck) while on the train you will have seats according to the original vouchers!

Lunch
The Wilhelm Tell includes lunch. You will get a voucher upon boarding the boat when showing your reservation.

Train from Bellinzona to Locarno/Lugano:

13:53pm         Depart Bellizona on track #
13:53pm         Arrive in Lugano/Locarno

And should you miss this train, the next one is at:

13:53pm         Depart Bellizona on track #
13:53pm         Arrive in Lugano/Locarno