Unless you're a real weakling, don't get too hung up on weight. You don't want to carry 20 lbs of shit you don't need, but I think for a lot of those ultralight guys it's more of a religion than any practical reason. If you're cutting the handle off of your toothbrush to save weight you're doing it wrong.
I personally hate cooking in those titanium pans. They are super thin and it's really easy to burn shit and also stuff sticks to them. I have one I got as a gift and used it on one trip and won't again, even though it was fucking expensive. I would carry a mini cast iron pan rather than use that thing. Now I just carry a jet boil and some aluminum foil. I really like putting shit like Ramen noodles, instant mashed potatoes, Instant oatmeal, couscous etc. portioned out in freezer bags and then just dumping boiling water from the jetboil into the freezer bag, wrapping it up in a t-shirt for a few minutes, and dinner is served. People get really elaborate with this but I'm usually happy with just mashed potatoes, oatmeal, and couscous. Just google freezer bag cooking if you want to see the fancy stuff. Carb heavy but you can supplement it with nuts/trail mix, beef jerky, etc. I usually have some candy bars too, but as I said, I will go for more food and carry the weight vs. trying to be ultralight and eat poorly. There is also the prepackaged backpacker food. I hear it's pretty good if you don't mind the price.
If you are in California, you have to carry your food in bear proof containers. It's probably not a bad idea other places as well. My backpack has a detachable day pack and I always just kept all the food in that and then hung it in a tree away from camp but in places that isn't legal now.
Some people go to an indian grocer and buy ghee to cook with instead of butter because it's shelf stable. If it's only a couple days though, you can get by with regular butter or margarine. If you're worried about it going rancid, you can put it in a ziploc and stick it in a creek at night but really that's probably not even necessary if it's just a weekend trip.
When you get a sleeping bag, don't think that if it says it's a 30 degree bag it will be comfortable to sleep in at 30 degrees. I have a zero degree bag and have slept in it at 30 degrees and spent half the night shivering. The degree rating means that you won't die at that temp, not that you will be comfortable.
I've never been into hiking boots and mostly just wear tennis shoes but i have gone places where you're walking on rock most of the time and by the 3rd day my feet were killing me so know what your terrain is going to be like.