That’s an awesome itinerary! Plan ahead for London because of the Olympic Games though. There’s a boat from Dublin, but lodging may be hard!
It’s aiming high! [Defeated grumble…] I just became aware of the London Olympics this week. London will probably get skipped, maybe for Brussels or Erfurt. Looking at it from here, budget-wise, it’s going to be Paris and Berlin where we can spend the most time, because we have friends there. I’m not sure whether your wedding would be the start or the finale of the trip just yet (either way is lovely!), but it seems to make the most sense to either fly to Ireland and make our way out to Berlin, or to start out in Berlin, work our way west to Ireland and then fly home from there.
I’m a rookie when it comes to international travels. It’s still an “if” until it isn’t… but we definitely have it on the mind and talk about it regularly as a thing to do this year, and are looking to get it all sorted out and booked around April / May.