I'm the one who runs our site (
http://www.raiderrobotix.com )
I have not tried runing our site in a team, basically because reading 4 or 5 different sets of code, and then try to standardize them for easier updating would be a nightmare.
Since I started as a Freshman and slowly learned the tools and tricks of the trade. What I would suggest doing is training one member of your team (if possible a Freshman), and train them on eveything you know about web-design and programming.
Or you could train anyone interested in web-design and let them make what they want to see the page look like (either in teams or alone). Then have the whole club vote on what they have created, and pick that group or individual with the best page to run the page. This way if you choose a group, you get a group that works well together and knows what they are doing.