Lots of good advice already given. I have hunted with nothing but flintlocks for years. I still hunt (move very slowly on the ground) and rarely 'sit' on a stand for very long. It is something that takes some practice and aquired skill but is very rewarding. I carry the lock primed on half cock but always treat it as if it is on full cock. I use a stall on the frizzen if I come into camp etc.,. after I empty the pan.
Here are a few things I have learned over the years.
1 Deer are alerted by sights and sounds, but aren't necessarily spooked until they positively identify you as a threat. The most positive identifier to a deer of your presence is your scent. ALWAYS hunt into the wind.
2 The best chance you have of scoring is if you see the game first, so hunt as quietly and invisibly as possible.
3 Don't move unless you can do so quietly. I often hunt in mocasins or bare foot. If I have to cover ground I know I can't walk silently on I wait for cover sound, such as wind, crows calling, or even an airplane overhead.
4 Don't hunt too close to yourself. If a deer walks out in the meadow in front of you, you will see it. Don't look for it there. Look as far to the horizon as you can see in all directions and don't look for a deer, instead look for anything that doesn't belong: a horizontal line among vertical tree trunks etc.,.
5 Learn to use all your senses. Even the ones you might not know you have. I have learned I can often smell deer. I have often smelled fresh buck scrapes before I saw them. I have also learned to trust something I am just going to call a feeling. Many times I have had a 'feeling' and ignored it only to spook a deer from a nearby thicket without a chance for a shot seconds later. Now when I have that 'feeling' I won't move from that spot untill I have scanned every inch and scrutinized every sound and / or the feeling passes.
6 Use natural cover and only cross open ground when absolutely necessary.
On the family farm (my cousin owns it) he has a nephew who usually brings a crew in to hunt. They no doubt spend thousands on equipment with stands and feeders and trail timers and cameras etc.,...and they all perch up in their trees and get all bent out of shape if I invade their area, so I usually wait till they all go out of town and slip down with my old homemade rifle and get some meat for the table.
I doubt I'll ever hunt a modern rifle again. This is sooo much more fun.