Don't be too ambitious! Designing websites is fun. People who do that like to move on to greater things. So keep to basics and make sure you cover two groups:
1) People who may be interested in 'trying you out'. Just make clear how far you go, how slow you go, what sort of group you are (pictures here can say so much more than words). Where your starting point is and do they need to contact you beforehand.
2) Club members: Next ride details, links to more useful cycling websites and write-ups of past rides (if you can con someone into writing 'em) as they can become a useful self documenting history of the club or remind new captains of old proven routes.
Bottom line is to keep updating down to the level your successor is likely to commit to. That's another extremely important point make sure the site can function without you. Other people are capable of updating it. After all we would rather be riding wouldn't we?
Our Wordpress site is arguably overdone:
http://anerleybc.org/