I wanted to say thanks again for coming to our home last weekend to help with Molly. We have been walking in our neighbourhood since our session without the halti but instead with the leash clipped to the front of the harness like you suggested, and it is working GREAT! It seems like she is enjoying our walks more and is more free to sniff, and there is almost no pulling which makes me more relaxed as well. Brian agrees that she walks much better this way too. We have been working on the "leave" command and incorporating more games/play in her daily routine, using her Kong more, hiding treats in the snow to find and digging holes in the snow which she loves. We are planning an outing to our local park today to work in the vicinity of other dogs/people.
Thanks for all the info you sent, I have been through it a few times already and refer to it often.