About the cilantro, you can use fresh or dried. We use a lot of cilantro(aka the leaf of a coriander plant) in cooking pasta sauces as well as with meat marinades and even on homemade pizzas and enjoy the taste but it's all about what you enjoy and what works for you.
I know it's a very small amount, but I use literaly one tablespoon of fresh fine chop. It soaks up the evoo and lemon juice and imparts it's flavour nicely to the lamb(and you don't taste it much as the mint tends to overpower it). You can also use 1 tablespoon dried. I find dried cilantro(looks very similar to parsley) not as strong as the fresh stuff so if anything reduce the fresh amount. I know it's a lot so modify to your liking.
You can opt out of it, or add parsley, or just use one teaspoon. It's entirely up to you and what you enjoy. Give it a shot without if you're not particular about it and you'll still end up with an incredible piece of marinaded lamb.

Costco lamb is good here although Sobeys and Zehrs occasionally have deals on lamb and that's when I raid the meat section.
Regarding the woodchips, we buy the chipped mesquite among other flavours here at the hardware stores. I tend to soak the wood for 15 mins or so and then drain, place in a small smoker box or tinfoil pouch with a hole in it and set it right on the propane bbq burner and close the hood. I find it takes about 5 mins before you start to smell it then you have about 15 minutes to cook before the smoke becomes acrid and the wood catches fire.
***Remember that I am not using wet wood in my smoker OR in a proper wet smoker setup ... this is on the bbq, campfire or some other cooking source other than a smoker and I find it produces excellent results. I have also used a foil pouch with dry mesquite chips on the burner but I find it goes acrid sooner. Just my experience though. I use smoke as a seasoning on the bbq which is different from the way the Bradley uses smoke or your Big Green Egg. Only IMHO here all as this topic is as sensitive as politics...but people should do what they enjoy best( kind of like the cilantro

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