OK, here is the method - one method, but it's fairly standard.
Night is best. Don't get mugged! Know that you intend to do it one night. Best if you are able to go there before, during the day, and silently tell the place what you have in mind - send out the invitation.
When you approach the place on the night, look carefully, or vaguely as the case may be, to discern the correct place to sit. This part requires some practice, but in principle you look for the place that jumps out at you... may be the lighting, the shape of the land etc, but it is often that a spot you pick out during the day is not the spot that calls you on the night - always make a fresh decision.
Take your bag, some special items, water, something to sit on, etc.
Best to just sit quietly for a time. The place will go into silent watching when you turn up, so you are waiting for everyone to go back to normal. All the little life resumes, and you get under the covers so to speak, become one of the crowd. This also give you the chance to hear if there are any people or animals about, that may want to move along a little.
Then you do your expression. That is the call, the sign - controlled expression followed by controlled silence. In the expression you are sending out your intent, your invitation and your entertainment. First gesture to the primary beings around you.
You will notice that every such place has its elders. Large trees or shrubs, hills, mountains, creeks whatever are the big boys and girls on the block - acknowledge them. Also the moon and stars. Now the moon is a special case. There are times we don't like to be exposed to the moon - often preferred to be in moon shadow, then let the moon discover you once you are well into it.
State your request, then put on a bit of a show for the locals. This can be loud or very quiet - spirits can hear very well, though some shamans like to begin with a loud noise, just to wake them all up. Up to you really, how you feel at the time. It is usually in the high point of the trance state brought on by the spirit attractor you are using, that you will catch glimpses of shapes in the darkness - often like black emptinesses, or just intense spots of vibration. Other times you simply feel them - like a thickening of the air around you.
After that, sit still and silent for a reasonable time. That gives spirits the chance to glimpse through you a higher state, depending on how well you can do that silent thing. There you are bringing your spiritual peak to the place. Many very advanced practitioners do only this part, for months if necessary, and thus convert a low vibe place into a high spirit place - upon which those who see will later build a temple etc.
Then go home and have a dried banana.
You will dream of the spirit(s) approaching you, either some nights before or after. The question is will you remember. Take a torch, pen and pad to bed with you, and write ever little dream snippet down during the night, even if you swear you will remember, write it down. that will help your conscious self to take note of your dream self, and enhance the possibility of you remembering the spirit event on the astral.
I'll send through a message on the wind, to help.
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