Is there any way of tracing (or outputting) the route through a dialplan when a incomming call arrives? Currently I have set up a dedicated context that dials the appropriate extension. However, I would prefer to call the from-trunk context so all the good out of the box fax detection/out of hours checks get performed. When I do this though the call appears to get lost 
If you type:
set verbose 4
in the asterisk console, it will tell you everything it does (more or less). This may be enough for you to follow the progress of the call through the dialplan.