I love tripping by myself, I would say that between 75-90% of my trips have been by myself, often out in the bush far far away from civilisation, but also just in my house (or, particularly on acid, in the shower). I think that wandering around by yourself in a place of undeniable natural beauty is all the companionship you need- if my mind starts to spin in a negative way I just need to look around and see that the bush has survived millenia, survived multiple colonisations, I can survive the next 6 hours. I suppose it would be like a devout christian tripping in a church, what can scare you when you know you're standing within Gods house.
I don't like to go out into the bush when I trip on dissociatives, Dr Marcia Moore's unfortunate death puts dissociated aimless bush-wandering in the same category as taking ketamine in the bath for me. But this isn't a great loss, I don't know if I'd enjoy walking around for 6 hours on methoxetamine anyway. Maybe I should try bush-tripping with some 4-meo-pcp, I'm perfectly limber on that. But I digress, I enjoy watching the news when I'm alone on dissociatives. It sounds kinda weird and lame, as well as being a rescipe for a bad trip, but really it's fucking awesome! I mean, sometimes you can't understand anything they're saying and you just get to watch these distorted figures speaking in tounges at you, but sometimes I've found myself being 'sucked into' the news stories. Recently I was watching BBC coverage of the Libyan Revolution and I then found myself thinking how eternal the sky looked in the desert, how the sky the sand seem to meet and strech into infinity, because I was standing on the road to Misrata. Long story short, I lived a brief life as a Libyan teenager who stole a rifle from his uncle and went to fight Ghaddafi before being shot in the head by an African mercenary just on the outskirts of Misrata.
I actually find that television is best used as a trip toy- have you ever watched infomercials while tripping on 8 DOC-sold-as-acid? I learnt so much, maybe too much, about the culture that I am a part of.