I won a competition for a trip to Brazil, which includes a hotel stay and tours. The person arranging it has not been helpful - not replying to e-mail, not explaining what was, or was not, included. Should I bring a gift with me for the person who will be escorting me or are they likely to expect a cash tip? If the rest of the trip is as badly organised I won't want to give them anything!
I have arranged to extend the trip at my own expense and shall be visiting a bird lodge where the services of the guide are included. Assuming they are helpful I would expect to leave them something. What is usual?