My children and I are doing our first Tauck tour — Cowboy Country — next month. The gorgeous backpacks have arrived and we are very excited! I have read in various places that the family tours are unique in including gratuities for tour directors, drivers, etc. I was hoping for some expert feedback on whether guests really do “leave it at that” or whether there is an unwritten expectation to give something personally at the end — if so, guidelines on how much? Thank you!!