I would opt for "White van man" tyres! I ran motorhomes for many years on them without any issue whatsoever. And yes I did go to hot climes, and travel long distances at speed with them.
Others will, of course, disagree.
If the tyre manufacturer gives them a weight and speed rating that matches, or exceeds the original fitment then they are clearly well up to the job.
Your money, your choice.
If you haven't already got them invest in a Tyre Pressure Monitoring system. I bought a cheap set off Amazon to try them out for about £18. It has worked perfectly on my MH. The whole system is about half the cost of a single Tyrepal sensor, the sensors look to be identical!