I hope the dog isnt wearing a collar next week
If you are worried about pulling, Try lead training. Or a Anti-pull harness. It is just as effective as a collar IMO.
Lead training is very very simple. PM me if you want info on how to do so on your own terms and not your trainers.
As for other forms of training, you can still correct a dog without tugging at a collar etc. It can be as simple as giving a firm "ah-ah" ... Of course training tehniques differ from dog to dog. And obviously, colar training is not right for your dog, so i would honestly tryi finding a trainer that suits your needs as well as your dogs. one that will put your dogs personal needs first.