Back to your original question: often you will be at quite close to deer like <20m so although movement and concealment are key, camo can help. I personally wear some blaze orange - not perfect but dont overthink it. 90% of the time it makes you more visible.
If you like books order a copy of the nz Bush craft manual 40 from the mountain safety council org online shop. It has good safety and gear info very extensive and will step you across from UK to NZ competency.
I've liked a few other excellent advice here.
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