Which month is better for visiting these 2 parks? 1st 2 weeks in June or last 2 weeks in Aug? Are reservation a must and how many days in each park. We like to hike but might have to limit to short hi...
I'd shoot for the last 2 weeks of August. Lot of families curtail their long trips in late August due to schools starting. August would be better weather for sure.
We were in Grand Teton and Yellowstone in mid-July in 2011 and didn't have any problems with campgrounds or hiking on trails (in GTNP only) if we went early in the day. Just did day trips into YNP and that was crowded. If we were to do it again I'd go in late August as I suggested to you.
Safe travels!
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