Lots of good info here, but all pretty "fancy", I'd say. I prefer to spend money on practice ammo and match fees, so I have literally no competition-specific clothing or bags. Hiking clothes work just fine (as do street clothes), just figure out how you're going to tuck the layers into your waistband before stepping up to the line. Or strip down to a long sleeve t-shirt for the forty seconds that it takes to run the stage (my preferred solution). The fit of the clothes matter far more than the brand name.
I use a super cheap tool bag from Canadian Tire for a range bag. Zero complaints after three seasons of use.
It comes down to personal preference and getting the right equipment for what you are doing.
A casual competitor that shoots local club matches (a couple of stages) and the occasional larger match a couple hours away, has one set of needs.
Someone who travels across Canada, across the border/internationally, has a totally different set of equipment requirements.
I fall somewhere in the middle and need a backpack that will accommodate all my gear for the match, and for traveling to the match.
Those big square range bags that you haul around with one strap over your shoulder like a gym bag, cause more hard than good.
Go shoot a major match with one of those, where the walk from one stage to another is a long one and uneven surfaces/gravel, carrying 500 rounds and the rest of your gear, the fatigue that sets in is very noticeable.
The same walk with a proper backpack, where the weight is evenly distributed, is very comfortable and actually leaves you with some energy for the last stages of the day.