but, unless the weight is getting a bit much, then one of the larger models might fit the bill.
It's simple but sturdy (mine's one of the old originals from about 2005 (I heard of these via Guy who some of the old OM hands may remember as a regular contributor, he ran (runs?) WasdaleWeb as well as being in the MRT there).
I've also done as suggested and used the pro-tector as a water-resistant liner inside the pack once I've completed the flight, so it saves on taking a fully waterproof liner too, given that I pack my down bag and other essentials in individual drybags anyway.
I'm not aware of any options except the various roadside car parks and laybys.
Anyone know the current cost for camping at Gwern Gof Isaf or Gwern Gof Uchaf? As Kate says, they only allow day parking (Isaf certainly) but might it be an option to pay for camping and stick an empty tent up at the side of the car while you're off in the hills?