Very similar situation to myself that is. I can't see a neat way of fitting the vanshades when you have furniture, windows all round and a slider/opener behind the driver. Shame as I'd kind of promised my self blinds on my next van.
The other thing with blinds is do they have an exposed string/runner going top to bottom on them? I can imagine that being a bit of a problem with a nutty cocker spaniel and a young child...
I've the van-x curtains in my T4 which I fitted 4 years or so ago. They're great, fit well and quite tight, plenty 'black out' enough for me. I'll probably go the same route again now or maybe the veedub/Kiravans ones... They just don't look as good/modern as the blinds.