I made an overview of camping needs for overlanders on the campsite wiki pake of OSM. It is here. Useful for people who want to do some camping uploading themselves.

Some of your suggested tags won't work. Some are manipulations of already existing tags ... just use the existing tags! The people who produce the end maps use the existing tags .. they won't adapt to your suggestions .. particularly when there are already existing ones in use.

Some of your suggested tags .. well 'hot shower' does not exist .. it is simply shower .. I'm presently trying to add the tag 'temperature' .. for use with showers, baths, water_taps etc. That is presently open for comments .. will move to voting and hopefully be voted 'in'. Then there have to be enough people using it and then enough features with that tag for the renderers (the end map makers) to think it is worth adding. Not easy to add new features .. harder still to change existing tags to some thing else.

If you have an interest in adding things or changing things in OSM tags then join the tagging talk group .. I'm active there at the moment .. 'temperature', 'reception_desk' and a 'new' grouping of 'waste_collection' ... once those are finished .. well I might move on 'tents=yes/no/number'? But consider joining ... https://lists.openstreetmap.org/listinfo/tagging

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OSM campsite tags..
The page https://wiki.openstreetmap.org/wiki/...sm%3Dcamp_site
shows the documented tags .. in blue! The tags in red are undocumented .. and may change.... I'm for changing 3 of them, removing one .. and adding another.. but it takes time. If you want to add data (tags) to OSM camp sites .. use the blue tags on that page and they may appear on the OSM maps.. use something else and that reduces any chance of the information appearing on an OSM map. The data is there .. but won't appear.

Thanks for your quick and extensive comments. I have copied them to the OSM wiki talk page and replied there in order to keep the discussion at one place.

The comments have resulted in a substantial update of the tagging proposal.