@MichaelCraig; Yes, I think if you watch and watch, you can end up seeing only what your eyes can see, but as you say, being in the deep woods and feeling watched in turn makes us aware of other very helpful spiritual forces.
While my continual experience is of more human looking angels, I did have a very powerful experience of nature spirits some years ago, governed by (guess what?) a powerful father figure. Those who like the 'old ways' sometimes called pagan or wiccan etc., describe the god and goddess as being loving creators, yet they generally can't accept LDS views of the same beings just described in a slightly different way. And of course many church members are a little scared of 'old ways' as they see them as perhaps devilish. While anthropologists and others may say that mankind created a god and goddess in their own image out of primitive fear, my experience and that of countless others shows that to be a very weak perspective, though natural to the 'natural man' I suppose.
Guardian angels - oh yes, certainly. I'd say more one close friend who promised to stay by your side every moment of this lifetime. They may save your life, or may not, depending upon what you have to do. But that particular point bothers many only because we're usually scared of the process of passing on. In everything else they guide and help, offer loving light, and are conduits of sacred power when we don't feel up to any task at hand. I can say from experience that when someone gives a blessing where reality changing power is required, they do most of the work. What I think interesting is that Christ urged us to be likewise, in fact, like himself.
Oh yes, regarding dreams; In dream state we're in a different level of consciousness, obviously, and so perceive things not normally done when the conscious mind is very active. Many times we're shown and told things in dreams, as prophets have been in past days. I'm sure that sometimes when our conscious mind would be scared by something which seemed too much to see in the light of ordinary day, we're offered it in dreams. That way, we can accept things on very deep emotional levels, but have the option of saying "Oh, it wasn't real you know".