I don't really believe there is really such a thing as a special camper tyre (at inflated prices), sorry for the pun. I've never found any explanation of what makes them so special.
Learn to read what all the numbers mean, particularly the load rating. The C at the end means for commercial/cargo use i.e. running around fully laden at max. allowable speeds. Like a campervan. Check your handbook and you may find that you can upgrade the tyre width and load rating on the same wheels, that's what I did with mine after a couple of weighbridge tests showed the rears were close to the upper limit, my Ducato handbook showed two options on my 15" wheels, the originals were the lesser ones.
When I last changed mine I went for some M+S tyres which were a great improvement. Tigar cargo speed, owned by Michelin, made in Serbia, visually identical to the posh Michelin camper tyres, exactly the same ratings to the last detail, but less than half the price. I even suspect that the Michelin ones may come from the same place, just differently marked.
The original Pirellis were condemned at the first MOT, not for wear but serious sidewall cracking and some worrying bulges. Made in Turkey I subsequently discovered. The spare, never been used, under the van, never seen sunlight, is also in similarly bad condition, and at the next replacement will be scrapped and the best of the old ones put on instead.
When my GF needed real snow tyres and rims (her car has extreme ultra low profile super grippy tyres on very expensive special option extra large alloys that are useless in cold wet weather, nevermind snow and ice) we did our research and ordered a set of Nokians from mytyres pre-fitted on steel rims, completely different size, 15" not 18, but in accordance with what Seat specify. They were delivered from Germany (actually I suspect that mytyres is a German company) within two days, to her dealer, who puts them on for her in the Autumn and takes them off again in the spring. They look nice too, with a set of £20 hubcaps hiding them.
She scampers around on them with great confidence in some very extreme conditions where other people can't even move, and overall they cost nothing, apart from the rims (£30 each, and if one gets dented it can be beaten out or replaced rather than having to replace an alloy which would probably be £500, just one bad pothole can and has done that) Over their lifetime they will have saved wear on the Summer tyres, which also cost a lot more.
I don't want alloys on my camper, steel is just fine, for me.
I'm not suggesting that policy for a camper, I've been very happy with my Tigars on the camper, and they certainly work far better than the originals on e.g. wet muddy campsites.
A genuine winter tyre carries a snowflake marking. Mytires website will show you all their offerings in great detail, which have the snowflake, there are many other options than Michelin, and their prices are good. I've found UK tyre suppliers very unknowledgeable about these things, and if you leave it late in the season they can't even get hold of them, they are produced and stocked in advance of anticipated demand, which is minimal in the UK. Whereas in Germany they take them very seriously and magazines do extensive independent tests every year.
