We would like to visit Yellowstone, Teton, and Badlands for our honeymoon this year, but have not done any planning yet. I have seen several times that you need to make your reservations a year in advance, are we too late? We would like to stay in a more affordable hotel, but renting a small camping trailer might be an option. How much do rooms go for inside the park vs outside the park? What time of year is best to balance room availability vs good weather? If I rented a small trailer to sleep in, how much is overnight parking, and do we have access to showers and bathrooms? Are there other options I should look at like airbnb?