Calendar help please

Hello!
Ive been searching for quite a while for a easy calendar to use on my family blog site. We have a private blog where we organize the trips to our common holidayhouse.

The need:
1. Easy to create bookings in the calender (ie family A will be in the cabin on the 24-30th Jan), best if its not from the admin panel as they are really crappy at computers.
2. Easy to view the full calendar in a outlook/google kind of way. The whole month should be displayed or even further ahead.
3. Comment to bookings, ie family A books a weekend and family B asks if they can come too.

Best would be if they could click on a date to book that date or several dates from that date.

Greatful for help peps!