I enter wonderland as a mental version of myself, for all purposes it is me and the senses of the physical can be mostly limited to what the avatar experiences. A HALO jump is my favored method of entering Wonderland, though if I'm in a hurry to force I'll teleport in. Both are a rush and feel fairly real. The way the avatar sees varies between first person, third person over the shoulder, third person fixed, and through Tulpa eyes, the last one being less used.
The wonderland is a pretty realistic place, as I've been there in person and know what the mountains of North Carolina look, smell, sound, and feel like. The snow and wind is pleasantly chilly, and the fireplace inside keeps the cabin warm enough. Footprints appear in the snow when I'm paying attention to where I've walked. Now that I think about it, though I've only ever encountered an enormous, possessed tree in the main region of wonderland as far as active wildlife goes. The realism ends where the lack of fauna begins. Other than that, it is a pretty stable place unless an external distraction presents itself.