Same as most other replies, we leave sheets and blankets on beds, any think stuff goes on the dinning area (pillows thick doona's). We have an innerspring quenn bed with a woolen underlay (very cosey and softens the crappy innerspring
).
On the floor we store a few buckets (used for bathing our little girls), and sometimes the weber Q100 in a duffle bag, usually ontop of our annex area rubber matting to stop it all sliding around. Also the porta cot for our youngest seems to wedge nicley under the dinning table. For rougher trips on dirt roads i strap the weber in its bag to our roof cage on the Patrol.
Like Bushy said get some cheap tarps for those days you have to pack up with wet canvas
Once you have it set up the way you want it with everything you need, trips away will be so easy! We finally had a weekend without rain and went away just for one night. Thats what i love about my Jayco, its always packed ready to go, just throw some clothes bags in the car, basic food in the Waeco and we are good for a relaxing weekend away.
Enjoy