Aquaroll storage

We are real newbies but have taken our van out on four week-end trips now. We have learnt a lot, especially which bit fits where with the awning.

We are wondering where other people store their aquaroll and waste master when travelling. We have encased ours in black bags and put the aquaroll in the shower whilst the wastemaster rides in our wardrobe.

I'm sure there must be a better way. Any suggestions would be very welcome.