Toiletries and Medical Supplies: If you are planning to come in the summer you will need sunscreen. Even though most people think Spokane would be like Seattle (rainy, cold), this is untrue for the summer months. The temperatures will be in the high 80s, 90s, and sometimes 100s.
Luggage and bags:
Take anything you usually would when it comes to bags.
Clothing/Shoes/Weather Gear: In the winter: warm clothing....it snows here and can get as cold as -30 (C).
In the spring and fall: it rains a lot and can be chilly. Bring a warm jacket with you.
In summer: it can be very hot (40 C) so bring clothes for warm climates...but bring some clothing for cooler days because it tends to rain a lot and also can get very cold very suddenly.
Toiletries and Medical Supplies: sunblock is a must in summer and if sking.
Photo Equipment: Bring your usual photo equipment. There are many national forests in the surrounding area and it is 30 minutes from Idaho and it's wilds from Spokane. So there are a lot of great places to go and take photos.
Camping/Beach/Outdoor Gear: Usual camping gear...according to the time of year.