Yeah, although sometimes お願いします can serve as a sort of dummy requester, like する can be a dummy (or light) verb, so you can use it in place of the specific verb with ください. For instance, to a driver, you can say 京都駅までお願いします.
Thanks. I kind of thought that, but I wasn't sure of に's use with ご用 (not sure that I've ever used ご用 as a verb before) so I just wanted to lay out possible options. Thanks for clearing that up .