I agree, just buy the Wizz Priority add-on. Not so expensive. Around 10-15 EUR, max 20 EUR I believe, but the price fluctuates after purchase of the ticket, so you could save a bit if you are timing you post-purchase-ticket Wizz Priority add-on right. It is cheapest to buy it as an add-on at the time you purchase the ticket.

From my recent W6 flight ex KRK, I have witnessed all pax with trolleys but without Wizz Priority being asked to pay the "oversized hand luggage fee" (EUR 25?) as obviously none of trolleys were able to fit into the tiny Wizz luggage check rack. There was a gate agent walking the lines for boarding asking all pax with trolleys if they had Wizz Priority/checking their BP. Remarkably many pax had Wizz Priority (I would say at least 1/3) and were allowed to bring their trolleys onboard with no issues. I didn't witness any pax with backpacks being singled out for hand luggage check despite that several backpacks looked bigger than allowed according to the Wizz hand luggage rules.