In researching Tokyo I have decided I definately want to make it to Kamakura for the history and culture of the old capital but wanted some input whether a full day is enough or whether, as some guidebooks recommend, an overnight would do it proper justice.

I am holding a hotel resevation within blocks of Shinjuku station and could get an early start and could spend a whole day there as I'd done with sidetrips from Osaka to Nara & Himeji last last time in Japan. The bonus however with the overnight is getting to see the sights at a more leisurely pace and perhaps early the next morning before the crowds arrive while the hotel pricing might be a little cheaper than Toyko but on the downside I would have to schlep my luggage more than if I did it as a day trip.

Any input on the subject would help though the trip isn't for a while yet. Thanks!