Hi Paul,
This site might help with spectral curves of these filters.
http://www.astrosurf.com/~buil/filters/curves.htm
Actually looks like the UHC lets through into the IR range while the Baader would block this IR. With a modded DSLR both would be the go I reckon but maybe not so much with a unmodded camera?]
I would give it a go without the baader and compare?
cheers Gary