To register for a tour you will need to both fill out and submit a Registration Form and pay the deposit.  If you want a Single Supplement (room to yourself throughout the tour - not available on Bike & Barge Tours), you will need to pay that now at registration by using the drop-down menu on the PayPal button. You'll need to repeat this process for each tour you are registering for.  You will use the same PayPal buttons to make your final payment.