Do we need to skip Donegal and Derry?

My family is traveling to Ireland in a few weeks. We only have 12 nights, so we're trying to make the most of it, while also being aware that the kids (4 and 6) and the weather might not cooperate. We don't plan to stay out late at pubs due to the kids. Our priorities are natural beauty and historical sites. I've read through this subreddit many times and have more than enough sites to see, but the warnings about the long commutes have me concerned, even as a Texan. Here's the route:

Dublin - 2 nights

Killarney - 2 nights

Dingle - 2 nights

Galway - 2 nights

Donegal - 2 nights

Derry/Bushmills area - 1 night

Dublin - final night to fly out in the morning

Based on my reading here, I've cut out single nights in Cork and Belfast and added an extra night each to Galway and Donegal. Are the final few days (Donegal to Derry to Dublin) manageable? If not, where should we add extra time?