Hot take: a hostel owner in Lisbon told me my packing was 'a rookie move' and he was right
Two years back I showed up at a hostel in Lisbon with a 55 liter backpack for a 10 day trip and the guy at the desk just looked at it and laughed. He said 'you paid 40 euros to check that bag, didn't you' and I had to admit I did. He showed me his setup, one 28 liter bag and a laundry line he hangs in the shower, and said he hasn't paid a bag fee since 2019. I switched to a carry on only setup for a trip to Porto 3 months later and saved $70 in fees each way. Now I do sink laundry every 3 days instead of hunting for a laundromat. What's your max bag size before you cave and check it?