Get a big tarp, drape it over the whole boat and cut around it leaving it about 150mm too long. Fold up the extra, twice, and fit eyelets to take an elastic shock cord. You can shape the tarp to the boat by folding in large darts and catch them into the the eyelets when you fold up the bottom edge.
To attach it to the boat I use pins, kinda like wire tent pegs, and they push through holes made in the rubbing strake, then simply stretch the elastic to clip under the pins.
Your boat doesn't appear to have protruding rubbing strake so you'll have to be inventive with the fastenings around the tubes.
If you want height, in wouldn't be too difficult to put up a frame at your console - then you could stand to pull yer pants up!
Cool pics BTW!