PP back - good luck! At this age, a lot of the quality time is being around and being there for stuff like this, but a little less one on one than perhaps before.
Good to still shoot for that, but involving and engaging friends will keep your DH in the loop on who their friends are and will keep kids engaged and feel like their home (where they entertain and hang out with friends) is at Dad's too. Maybe even spend time with the kids in their area taking them to activities near their house- its the quality of the time, not the location that matters.