Hi Mark,
Yes, I have pondered this too.
As far as I have been able to ascertain, two solutions present:
1. You have already addressed it, being to run Stellarium in the field.
This works and I have had good results with this.
2. Obtain an "Astrolabe".
I understand these to be similar to a planisphere except with Alt/Az readings (instead of RA/Dec). I have not as yet been able to source one, although I believe someone on IIS has built a fully adjustable one.
I did see a UK site that would make a custom astrolabe for your nominated loacation for around 30 Quid.
I am wondering if it is possible to convert a standard planisphere to be used as an Astrolabe?
Here is a link a supplier site:
http://www.astrolabes.org/pages/personal.htm
Good Luck and report any further developments