Ciaran,
You and I may well be kindred spirits -- search my posts to this thread and see for yourself. As for skis --- I am looking to order the Mohn locking side mount (www.mohnsportracks.com) which will hold up to 4 pairs of skis plus poles on the passenger's side. I have had this rack before in my Suburban days, and it works. I am currently carrying the skis on a vertically mounted Yakima rack on the ladder (see below) but it is a pain.
Bikes --- now that is still an issue. As you can tell from my prior posts, I have gone the ladder route with shorty Yakima bars for a verticle carry as you are doing. Too much lateral sway for me to feel comfortable with (our tandem). It actually loosened up the roof top ladder screws necessitating a dealer repair (warranty!). And the DIRT that covers the back of the rig and our bikes ... And, it makes getting up to the roof box hard if not impossible. I am planning to look at a front rack for bikes, be it a bumper mount or maybe a front hitch receiver install.
How I did the Space Cadet box is detailed in my prior post, complete with link to pix.
My next quest, maybe at the same time as I look for a rear storage cabinet box, is quiet/electricity sparing heat for winter camping. I have gone the Mr. Buddy route, but it locks out above ~5000 feet. I have reviewed and spoken with the folk at Platinum Cat, and that may end up to be my solution.