I think the extra money buys peace of mind.
It is far easier dealing with someone in the UK or America, than somebody in Africa, as you never know what you will find when you arrive, or whether there will be anything at all. Unfortunately, Africa has earned a reputation for scams, which will definitely cloud a consumer's thinking. It is unfortunate. because, as you well know, there are lots of honest, reliable and fantastic operators in Moshi and Arusha.
Will definitely pop in Roger, as have to take my daughter up soon.