[mattwritescode]

In the past I have worked on a similar type of project but for a large trade show. After research we found these problems:

The problem with a straight QR code are that non technical people just have no idea what they are or how to use them (just ask your parents or friends).

NFC etc again have the same kind of issue. Non-technical people just dont know how it works (also the fact that only the higher end devices support it).

Personally I would go for one of the two following options after working on something similar.

You could look into an app for the museum. The app will have a QR code reader built in, but you can also offer geolocation. The important thing in this case is to advertise the app everywhere. Also give the museum free wifi so people can download the app.

Or look at an internal WiFi network which only servers your website. If you wanted to get a little more technical you could get the website to allow location (really only works on single floor buildings) to server items close to where you are.