I'm hitting Yellowstone in June. Flying into Billings... driving up the bear tooth pass and staying in Cooke City. If the snow Ismail gone, we're taking an ATV ride into the backcountry. Finishing it off fly fishing a couple days on the Big Horn.Go do a rim to rim hike at the Grand Canyon.
I'd say Alaska but the time and money budget might be pushing it. You could probably hang out and kayak fish along the Kenai. Supposed to be amazing. That will be my next trip there, one day...
I've never been to Yellowstone or Yosemite. That would be tempting but I have to believe better with someone along.