Wow that’s a lovely setup you have there. How eggciting it is to get hens! And 5, your municipality is very generous. Most here only allow 3 hens.
What breed of chickens are you getting? We would love to see photos when you take charge of them.
I am in the south simcoe county area here in Ontario, so we have the same general climate and this challenges with having poultry; here are some answers to your questions.
Bedding:
Inside the actual coop I would use wood shavings; I have about 4” of shavings in my hen house. Don’t use outside it will get very mucky and nasty.
Outside I would use a course sand, they will dig up the ground, so make sure to ensure they can’t dig under the fence!
If you can, I would cover the outside run, you will appreciate the extra space in the winter when the snow is 6’ deep

you can wrap the outside walls with clear heavy poly, to cut the wind. This way they will be able to get more space, and ‘get outside’.
Feed:
You can feed a Grower feed until about 20 weeks of age, I have fed Purina grower in the past, and other local feed mill feeds. As long as they are getting a good balanced ration you will be fine.
At 20 weeks or when they start to lay eggs you can start mixing off any remaining grower with a Layer feed.
Most livestock feed stores carry poultry feed, and shavings. Keep your feed in a container with a good tight lid in a dry area. I use a garbage pail with a locking lid to keep vermin out and keep the feed dry, you can store it in your garage or other dry area.
Keep feed and water inside your coop so wild birds can’t get into it, they can carry all sorts of illness.
Waterers:
The nipple waterers are fine, just make sure you have a way to keep the water from freezing in the winter.
Which brings me to extremes in weather.
Summer heat
I use large box fans and 24” large round fans (I have horses so I use these in the barn where the chickens are), they get over heated fast so having a source of keeping cool is very important.
Winter freeze
Your coop looks good a sturdy, make sure in the winter you have air flow. Some vents in the roof are a good idea if you don’t have any yet. Humidity is very bad in the winter and is the general cause of frost bite.
I personally use some form of heat as I have silkies and elderly ladies. I have a couple of Sweeter Heaters, and a couple of heat lamps. The chooks come and go under the heat sources as needed. But winter is a long way off yet.
More pressing is summer - I would invest in a couple of fans now.
if you wish to chat more and have questions you can private message me, if you select the ‘envelope’ at the top menu bar and input my id (ponypoor) you will be able to message me.
I am sure we will all look forward to seeing photos of you new ladies when they arrive.