depends what you want out of it. i'd start out real simple and basic then once you get members see what direction it goes and expand from there.
when i did my site years ago it was intended for local guys that i met through other mopar forums.. it was/is a place we can post about local cruises,shows or other things to do. its also a place we can plan where and when to meet up. it works well. though i think i like the facebook page more. thats even easier to get in touch with everyone. the site got real big for a while and was fun but was more then what i really wanted. its finally wound down and back to where i originally planned it to be.