Don't know what kind of player you are, but my advice would be similar to anyone. I'm an 11, so certainly not a great player.
First, soak it all in. Don't worry too much about scoring, unless you are in some competition. Take on tough shots, go for pins and hit drivers. That may not be the statistical way to play golf every time, but I played more aggressive than I normally do and don't regret it. Enjoy the great shots, forget the bad ones. The views are amazing, the courses are all unique and fun. You will have some of the most fun shots you ever get to hit. If you get moderately decent weather, I would be shocked if it wasn't one of your top golf experiences. It was my best, but I realize there are plenty of great places to play. It would be hard for me to believe you didn't enjoy it unless the weather is just terrible or something.
Second, if you have a bad caddie, thank and tip them and then ask for a different one. A good caddie can make the trip much more enjoyable, but a bad one can make it way less fun.
Third, get a poke bowl at the trails clubhouse for lunch (assuming you like tuna). In general, the food is solid all over the resort. Nothing too crazy, but I didn't have bad meals. Keep in mind you'll be hungry from walking 36. I don't personally see a reason to leave the property, unless you have something specific you'd like to do.
Keep in mind, I went in June, so I don't know the weather differences. We were fortunate with no rain, but it was windy. Definitely take foot care products and rain gear. Change socks between each round and probably shoes.
Lastly, don't let anyone tell you what the best course is or influence how you feel about certain courses or holes. All of my friends I went with had a different order in ranking the courses. That's part of what makes golf fun. It's based on how you view golf, the shots you like to hit and how you played that round. I loved all five courses. I had the most fun on sheep ranch, bc it's super playable. I thought Trails was the best course, but I believe I'm certainly in the minority on that.
I'm jealous and can't wait to get back there one day.