I don't want to come over as a kill joy, but as someone who works for several charities. There is a great in balance on some charities standing.
Guide Dogs for the Blind have millions in the bank, they employ very few blind people, I have several blind friends who are very anti this organisation. They have been investigated on several occasions as to miss use of funds. They own masses of property much of it on the Isle of Man.
Many years ago I fund raised for Macmillan, because they cared for my cousins wife who passed away from the dreadful disease. I raised £3,500 by a sponsored swim (I swam 3 miles... not bad with one leg). The treatment I received from the organisation was appalling, I won't go into details on here, but I vowed never to raise funds for them again. My wife had a similar ordeal with SCOPE.
Raising funds for Charities is great, I do it all the time I'm a trustee of two. But be very careful of who you are raising money for and how the funds are intended to be used. I will participate if the right organisations are chosen.
Amongst the Army benevolent charities Help for Heroes have been receiving some very bad press. BLESMA do not like attending events that they are in attendance at, the Legion have the same feelings. Anyhow I've said enough just be careful.