My current think about this is that I can probably do it next year. If I set off some time in late May I should be able to make it to Nordkapp for the solstice.
Leaving about the 20th of May would mean having to do about 60 miles a day on average, which should be possible. According to various things I’ve read on the net on the first day of a tour you can expect to be able to do as many miles in a day as you usually do in a week. Currently I do about 30 miles a week, but it’s pretty easy to increase that with a few long rides home.
Losing a lot of weight would be handy too, but I’m sure that increasing milage and getting fitter will take care of that one naturally.