Popular with some and travelling to other locations is a good way of improving your sailing and making new friends.
it really up to each Series organiser (normally the Area Rep on the MCA Committee) to decide what events are in the series, how many are going to count, what prizes there will be,....... Like an NOR for the series. It's been suggested that the formula of "(half the events + 1) to count" was a good starting point.
It would be good to have an small article on the website detailing the events and the number to count for each travellers series each year. Ideally Area Representatives would create this using their website account. If not, the webmaster will create these if people say what they want.
Note that there is a "blog" for each travellers series (if you file articles in the correct section and category). You can find this using the menu system - for example,
Regions & Clubs -> North Zone -> Northern Travellers 2012