Säntis is the highest mountain ofin the region, and there are probably dozens of hotels and guesthouses that also offer a Säntis suite.

The one I have read about recently is, however, a little bit special.

Or: "The one I have recently been reading about is, however, a little bit special."

It is actually located on a meadow some two hundred metres away from the guesthouse itself.

This sentence is good, but "actually" is redundant.

It consists of nothing but a small wooden platform, an old fashioned wooden double bed, and bedside tables and lamps.

If you mean that the "tables" and "lamps" are both bedside variants: "It consists of nothing but a small wooden platform, an old fashioned wooden double bed, and bedside tables and lamps."

If you mean that it has "bedside tables" and "(non bedside) lamps" then: "It consists of nothing but a small wooden platform, an old fashioned wooden double bed, bedside tables, and lamps."

The really special thing: no ceiling, no walls, is 24 hours of fresh air each day.

Or: "With no ceiling and no walls, the really special thing is 24 hours of fresh air each day."

Or: "The really special thing about having no ceiling and no walls is 24 hours of fresh air each day."

The grammar in the original sentence is slightly off, and I don't think that a colon fits this sentence very well.

Breakfast is served into the bed by the owner of the guesthouse.

I'm not completely confident in this correction, but it feels more accurate to say the breakfast is served "to the bed" rather than "in the bed." I think it is eaten "in the bed," but not served that way. Also, changing the sentence this way makes it consistent with one of your later sentences where you write: "without anyone serving me breakfast to my sleeping bag." ("to the bed" is more consistent with "to my sleeping bag" )

For this occasion, he will wears white gloves, a black bow tie, working trousers and safety shoes.

Sleeping under the open sky is a nice experience,; I recommend it.

Or: "Sleeping under the open sky is a nice experience, and I recommend it."

Or: "Sleeping under the open sky is a nice experience. I recommend it."

I occasionally do itsleep in my garden, but without anyone serving me breakfast to my sleeping bag.

I think "sleep" here sounds a little better than "do it." Also, the last "it" could potentially be interpreted as "avoid artificial light," so a reader might misinterpret the first half of the sentence as you avoiding artificial light, even if this is cleared up in the second half.

Säntis is the highest mountain ofin the region and there are probably dozens of hotels and guesthouses that also offer a Säntis suite.

The one I have read about recently is, however, a little bit special.

It consists of nothing but a small wooden platform, an old -fashioned wooden double bed, and bedside tables and lamps.

The really special thing is: no ceiling, no walls, and 24 hours of fresh air each day.

For this occasion, he will wears white gloves, a black bow tie, working trousers and safety shoes.

Sleeping under the open sky is a nice experience,; I recommend it.