TOPIC: Auto-populate a field

Hi
I have used DTRegister before and would like to extend its use to some other projects. I have a list of hotel options for an event. The user can choose one of the hotels to view and then click a "Book" (Register) button. I wish to have single event registration form and ideally pass the hotel name in the event link url and have a field pick up that parameter. I am currently doing this with a RSForm.

I know I could have the user select the hotel from on a dropdown but the user would have to remember which hotel they saw on the previous page. Only way I can think to do is to have a separate event for each hotel option but that's a bit messy.

Any suggestions?