A collie x husky, you're not afraid, are you?!
I would agree with crate training. The pantry sounds a good idea, but it might still be big enough for him to toilet in. Because a crate in actually just a bed to them, they won't toilet in it so it really helps with toilet training.
The absolute best dried food you can get is Orijen. It is very expensive because it doesn't contain any cheap fillers like rice, maize or other cereals, it is just meat and veg. (70% meat compared to around 28% for most premium brands. However, because of the ingredients you need to use less, so it's actually more economical. Also, because it has no rice or fillers, it will keep wind down, your dogs poos will be smaller and firmer and he won't have that 'doggy' smell so much.
A great book to get is 'The Perfect Puppy' by Gwen Bailey. You can get it on Amazon. I give it to all my new puppy owners in their puppy packs and it covers pretty much all you need to ever know about owning and training a puppy.
Not sure if you know, but a dog's exercise should be restricted for the first year of it's life to prevent hip dysplacia and joint problems. 5 mins per month of age per day is enough, definitely no more than double that but split it into as many short walks as you can. You can keep puppy tired out by doing lots of short training sessions too.