[H] Security question

[Winterlight]

I am at a hotel. The only internet connection I have available to me 
right now is the hotel wifi OPEN connection. I want to purchase a one 
month VPN to make the open connection safe but I have to pay for the 
VPN before I can use it. Once I am on the VPNs  secure / locked web 
page I can sign up and use  a credit card and I am safe because the 
page and the transaction is SSL encrypted  ...right? Somebody might 
be able to see I went to the page but they can't see my transaction?