WCIF Various Objects For A Prehistoric 'Hood?

For some years now I have been toying with the idea of making and playing a prehistoric 'hood, and I am currently searching for various bits of CC to use. If anyone has any links, suggestions etc relating to the following things I would greatly appreciate them! :-)

1. Round decorative thatched roofs, to use for roundhouses. I would like to be able to build roundhouses, as they were common when people started settling and building more permanent homes. See below for a RL picture to give an idea of what I'm looking for. If anyone knows of non-thatched round decorative roofs I would appreciate a link to those as it may be possible to recolour them.



2. Decorative rocks. Any and all decorative rocks, of any size ranging from tiny to huge! Any natural rock colours are of use, as are "ice" recolours, in case I ever want to have an "ice age" and want decorative glaciers and so on. Rocks were used for various different things back then - for building, for graves, for monuments and of course there were just generally natural rocks around as well. So yes, I am looking for as many rocks as I can find, basically!

3. Seasonal (they do need to be seasonal, as I don't use non-seasonal trees in my game) birch, oak, hazel and pine trees, especially build mode ones (though 'hood deco ones may also be of interest to me). Obviously pine trees don't change much throughout the seasons, but they do need to be able to be covered by snow in winter, otherwise they won't look right in my game.

All links, suggestions, comments etc are, as always, much appreciated! :-)