I’ve used the following trolley for 4 festivals now and it’s still going strong.
I think wider tyres are fine if they’re not Pneumatic, less pressure over a smaller area I guess? I dunno.
Either way, I can highly recommend this.
Holds my tent, a couple crates of beer, sleeping bag, and my rucksack when slowly moving in queue.
Bonus: it holds 2 open beers for the journey too.