Congratulations! Campfire Time has some excellent advice. Assuming you have only 2 weeks, then Yellowstone & the Tetons might actually be plenty for your destination; it's going to take you several days to get out here from Cincinnati and several days to get back. Yellowstone is huge and you'll be driving a lot within the park - whether you hike or not. Those 2 parks are contiguous and the same one-time entry fee ($25 for a week, I believe) works for both parks. IMO, you can't beat these parks for a place to honeymoon! There is no way you can see Yellowstone in a day, or even two - allow a minimum of 3 full days for that park, plus a minimum of one day for the Tetons. We're not hikers, but there are some dandy ones we or friends have done: in the Tetons, take the boat across Jenny Lake to Hidden Falls & Inspiration Point; in Yellowstone, Storm Point, Shoshone Lake and Natural Bridge are some possibilities. Other activities you could consider: horseback riding, scenic boat tour on Yellowstone Lake, rafting in the Tetons, the stagecoach/horseback ride with steak dinner at Roosevelt Lodge in Yellowstone. (Advance reservations required for the last one, through the concessioner Xanterra.)
From Yellowstone to Glacier is a
long one-day or a two-day trip, one way, should you be interested in seeing that park as well, so be sure to allow for that.
And if you are going to any of them,
make reservations ASAP! They are very popular and the chances of finding a campsite available, just showing up last-minute, are not good. This is true even of CGs outside the park. (You can visit the Tetons in a day trip from West Yellowstone; it will be a
full day.)
2020 Toyota Tundra CrewMax 5.7L V8 w/ tow pkg, Equal-i-zer
2020 Lance 2375