I totally agree! Although I think modern medication would be more useful than gold - pure quantities of modern meds weigh next to nothing. If you save enough lives of the rulers and their families they'll give you all the wealth and resources you need. They'll consider stealing the medication from you but they won't know which medications should be used for which illnesses, until they torture you I guess. I can't really think of a way of making sure they "be nice" rather than forcing you to give them everything you have. They weren't afraid of doing the unspeakable in pursuit of power back then.