Thank-you everyone for your advice - I currently carry a small notebook which I use for all of my medium-format work but think I need something more substantial. I am a fan of more information when recording shots but that said, I spend my working days in front of a computer spreadsheet and the idea of either transcribing information onto a spreadsheet or spending time inputing notes is not very appealing. I do think Gerald brings a point I never considered, the wind moving the card about, considering some of the trouble my little notebook currently causes.

I might need to give this some more thought but again, thank-you.