Dylan:
I'm surprised that your Wildlife Ministry would allow NWTF volunteers to trap and band birds without their assistance. The way it normally works is the state/provincial wildlife agency oversees the trapping and banding and the NWTF local chapters assist them.
Here in PA there has been an ongoing study. The NWTF funds the major part of the expenses and PA Game Commission provides manpower and expertise. NWTF volunteers sit in the blinds with PGC employees and help with the trapping and banding process.
Calling the birds is not normally done as it is bait (corn) that brings them in. Trail cameras monitor visitation times. When a bait site shows consistent visits with the right make up of either gobblers or hens, the blind is put up and the cannon net set.
Here is a link with some good info:
http://www.portal.state.pa.us/portal...=622312&mode=2
If you'd like some phone numbers for PGC or NWTF people who have experience doing this, send me a pm and I'll get them to you.
Good luck.
Larry