biking the Lofoten Islands in Norway

We want to bike the Lofoten Islands either before or after a visit to Ireland on June 17-22. We have Bike Fridays that we will take. We'd like advice from anyone that's done this, specifically:

1. Late May or late June best?
2. Would it be wise to rent a car?
3. Could/would you travel by bus?
4. How did you get to the Lofoten Islands?
5. We plan to stay about 3 weeks, any other suggestions of places to visit that are close?
6. We don't plan to make reservations at B&B or hotels, since we don't know how long it will take to bike from place to place-is this smart?
   7 Any other suggestions?

Having done a bit of traveling on the roads in the Lofoten's by bus, despite the topography of the islands one thing i can tell you the roads are supprisingly flat!

1: The weather will be similar, probably slightly warmer in June (which is a good thing), but also more visitors (if that bothers you).
2: Three weeks is plenty of time to explore Lofoten on bike. A car would not be required.
3: If flying in/out via Evenes (Harstad/Narvik) airport, it would be a good idea to use the bus until you reach Lofoten, to avoid biking along the the main road (not too interesting, and some long tunnels on the LOFAST road.) If you go by plane or train to Bodø, use one of the ferries from there. If flying to one of the tiny, local airports in Lofoten (Svolvær, Leknes, Værøy or Røst), just bike from the airport.
4: I biked there - I live nearby. :)
5: As mentioned, three weeks is plenty for Lofoten. I would advise venturing into the Vesterålen islands north of Lofoten as well, they are just as interesting, less road traffic and more secondary roads suitable for biking. In Lofoten, you'll have to bike many of the stretches both ways, there's few "loops".
6: You'll probably be fine making reservations as you go - call to the next place in the morning. Fully booked accommodation could be an issue in June, less so in May. I would highly recommend that you bring camping gear, as this will enable you to stay in many nice places where there's no lodging, and also take away the stress of planning. Getting a shower a few days a week is nice, though. :)