Couple of tips for you to explore then. go to B&Q and have a look on the rope, shackles and tubing section. You'll find some mini bungees. I mean tiny! Get 4 of those and shorten then by about half. When you come to put the tent away, use one per side to hold the bottom skirt up. Use the holes that the window props go through. Then at the front do the same thing but hook the upper end onto the aluminium channel. This stops the zip catching and jamming. It really works like a charm.
Also when you come to op the tent, keep a real eye on the entrance half where the side of the tent slides in the channel (the same one that the cover slides in). When you open and close the tent, the side beading have to slide back and forth. You can - I stress can, but not always, have the beading slip out of the end of the runner. There a plastic guide. If it comes out, you will really struggle to push the beading back in. I drilled the rivets out and slid the bead back in and then riveted it back together. Not done it since, but I wondered why the tent never sat properly. It was this.
If you plan to park up on a hard surface, I'd have a small ratchet strap or a cam lok strap to go around the steps and through your tow bar. This stops the ladder being kicked away. On mud, the ladder digs in.
That's all I can think of for now.
Oh, I don't use the extra shower tent bit as it really doesn't fit the back of the truck very well. Gary has the HM original; version but comes off the side of the truck. It works OK then.
Chris