Hi Michael- No double stroller, and actually don’t own one either. We decided to just get 2 city mini GTs for regular life and a single umbrella stroller that we use when we are out and about traveling or need something small. I really, really want one of the GTs for the trip but it’s too heavy for us (and probably too big) given all the travel we’re doing between Switzerland and Italy, but I will tell you, I’d probably bring it if we were just going to Switzerland.
We are bringing a McClaren Triumph umbrella stroller for the 3 year old. We are winging it for the 5 year old. The five year old mostly prefers to walk but will occasionally jump in a stroller if we are at a zoo or the like. The 3 year old is fully unpredictable. I feel like we will sort it out using it for whoever wants to ride it or figure out a plan B if it becomes absolutely necessary. Some friends suggested that we get a backpack carrier for the 3 year old, but I don’t think she’d be agreeable for it so we decided to not take that approach. All that being said, we are mostly in cities, trains, and walking paths - not really hiking.
I don’t know if that helps, but there you go.