Uhm, yeah, I know I should be more specific. We were thinking (maybe) about traveling to Bergen by train, and then rent a car there. Also we can hike, but not a lot (I think over 20km a day would be too much for us), and I can't imagine us camping. Personaly, I'm more into medieval stuff, but I think the general idea of the trip will be to visit natural attractions. 
I'm sory I can't express myself correctly, I'm tired and kind of stressed out. 
I'd stop over on the way to Bergen at Finse station (aka. planet Hoth from Star Wars) and maybe take a walk on the outskirt of the Hardanger highlands. I'd definitely consider renting bikes and going down
Rallarvegen to
Flåm. From there I'd take the
Flåm rail back towards Finse or Bergen. There's usually a viking market/festival in Gudvangen, just 20 minutes from Flåm, in July. I believe there are regular buses from Flåm to that place. They're making a kind of viking village there nowadays. There's also a reconstructed stave church in Bergen.
It's a few hours away from Bergen, but
Trolltunga is a popular hike and it's also fairly close to Jostedalsbreen glacier with skiing or hiking opportunities all year long. It's in the
Hardanger fjords just east of Bergen, known for fruit and coastal villages - apparently it's where Aksel and Sigrun Eide live and where Sigrun comes from. Tourists (Germans and Brits) seem to like to fish there.
I'd also consider heading south for a bit to Rogaland county with
Stavanger city,
Hafrsfjord battlefield
prekestolen and the
Jæren cultural landscape.
North of Bergen you find the Sognefjord, which is the largest fjord of them all. It's very popular, but I haven't been there much so refer to the
official guide for that one.
