Okay, so what I am gathering is you want to go into your dream world physically, and you want to be able to bring others with you? So, first off, when a person dreams they create a type of "dream world", sometimes dreams give them signs, impressions, and other details that can mean something to them in real life, but, you can't go there in physical sense, nor can you physically bring a person with you.
I think Skylar is more talking about non-physically, as in the group of friends on her profile, being invited to experience her created dream or astral place.
I think there may be some possibity, as far as belief, since there are people who believe they can (with permission) visit other people in their dreams.
But here's the thing: everyone involved must be practiced enough to do so, receptive of visiting and being visited in dreams (since they would all essentially be visiting each other's dreams collectively), and in very good control of their dreams.
I recently read a tale of someone in a dire supernatural problem who claims to have called his (also sleeping at the time) friend into his dream for help and they had a mutual experience of banishing.
But again this comes down to belief.
And if it is believed to have worked, be awaere that everyone may experience the same place a bit differently.