Only thing we found was a van hire place in Milan for the three who planned to fly to Milan this year. Plan was to leave bikes and 1 person in airport while other 2 went to get the van.
Ends up the 3Rd person dropped out so the ones flying just got a decent sized estate car instead. They were relieved.
The van hire pkace seemed very helpful, even offering to stay open late as the flights weren’t the best times but ultimately it was going to be a right hassle and stress, not cheap either. You’re probably better off with 2 cars.
We drove. Well drive again next year too. Well less hassle overall.