I myself have not used blinds, and have only had some limited exposure to feeders and such, although there are a couple on the outside deck here at the home where I'm currently residing...
But, I will say that birds do tend to hang out at those few feeders! At this point I don't have my gear with me! I am looking forward to getting my "stuff" in, so on nice spring days, I'm looking at setting up my tripod, and my camera(s) and my nice long 100-400 lens, and, given good light, getting some little bird shots!
As to what I may have "learned about birds over the years, well, I don't claim any expertise. But, something that has come up, both with these little bird feeders and then in my outings, has been that in some settings, some if not many birds are relatively "comfortable" being around people!
For instance, I have spent many hours and days in wildlife refuges and wetlands, places where some very interesting and photogenic birds are common!
As such, I am quite aware of the fact that even though a critter may be quite used to people being around, whether in a car or on foot, it would serve you well to be very careful when observing and/or shooting, because any quick movement will tend to be noticeable and the critters will be likely to skitter off!
the point being, keep your eyes open, be ready to take a shot but not active in a way that might scare the critters off, but if you are prepared, hey, you can occasionally make the "capture"!
Here are a few shots I grabbed at a nearby wildlife refuge, driving through in my car, and as I spotted a "subject, slowing down and stopping my car, and then perching my gear (solid body and long lens out my driver window, the window "sill" being the surface I had to perch my camera/lens on, a challenge, being careful not to disturb my subject!
First, I noticed a Great Blue Heron perched at a pond and getting ready to take off. I set out my camera, the 5D Classic, mounted with my 300mm f/2.8 IS lens, and as the bird began to take off, I had to carefully pan and "track" it, and it did eventually make it back down to land!
then. my next "subjects"!
A hawk was perched by the side of the road -- Again, being careful to make no quick movements, even though obviously the critter was accustomed to some activity nearby, just not obtrusive activity:
It made for a nice "portrait", again using the 300mm lens:
At that same refuge, other birds also would be perched and you could slowly drive up for more "portraits"...
A blue heron
And then, a Snowy White Egret: