Hi Kris, when doing night photography the phrase 'it's all about the light' is critical to the success of the image. In these images you have sufficient light to properly expose the foreground and some of the middle ground.
You have two basic lighting options, expose for the natural light (dusk/sunset/sunrise/moonlight) or use lighting sources. Typically, if you don't have natural light, images that are not in the city are extremely difficult to get without planned lighting sources. It's as if you are doing portraiture of nature in a dark room.
This is not to say that you can't get some fantastic moody images after dark, it's just that you need to have a target 'look' you are trying to achieve and the lighting necessary to create that look. Next, in almost every case you'll need to take bracketing exposures due to the difficulty in getting the correct exposure under these conditions and the extreme contrast ratio between what is lit well and what isn't.
I shoot almost exclusively with available light, even when shooting night photography, so if you need help with flash or other controlled lighting, others can provide you more guidance than I can.
When you look at these two shots, what do you like about them?
What would you like to change?
Hope this helps you to focus on a direction to go with your night photography.