What would be the most recommended NP trip 4-5 days end of Aug with 4 kids under the age of 9. Did Yellowstone & Grand Teton last year & they loved it.
Either the 3 national parks in Washington state can be done in 4 to 5 days,
Or you can go to san fransisco, lake tahoe, yosemite, kings canyon and Sequia in that time
The weather should be decent in those 2 locations in the summer.
Utahs a bit hotter, either you can go to zion, bryce and Grand canyon n rim,
or moab area (canyonlands, and arches) can be done as well, there also a lot of activities in utah right outside of the national parks.