One of those 12' x 12' accordian frame canopies with a wind screen is great for keeping dry during rainstorms and out of the sun in the heat of the day.
For light, I prefer battery powered lanterns over fuel powered ones. They're not quite as bright and not at all nostalgic, but they don't get hot, and there's no globes to break, or mantles to change. Overall, they're just much more rugged and simple.
The foam pads and Thermarests for sleeping do keep small rocks from poking you, but they make it feel like you're sleeping on a giant flat rock instead. So for anything beyond a night or two, I prefer an air mattress. I actually sleep as well on that as my own bed.
If you plan to cook anything, take a bottle of McCormick Montreal Steak seasoning. Makes almost anything palatable, even Spam for a meal or two. Learned that one from a hunting buddy in Alaska. Thankfully he packed some, as it made it possible to swallow the outfitter-provided food and stay "nourished".
More than anything, your biggest consideration should be towards what kind of camping you'll be doing and how much stuff you actually want to have. Big, well outfitted camps are cozy, but take considerably more time to set up, tear down (a real pain when the trip is over, you're hot and tired, and just want to get home), plan for trips, restock, load/unload, and carry the often unconsidered burden of taking up precious storage space in your basement or garage for the other 99% of living, at home.
Before we had kids, my wife and I used to take frequent weekend camping trips. Literally, all we packed was out little freestanding dome tent, a flashlight, sleeping bags and pillows, a couple of blankets to cushion the ground, a cooler with drinks, a change of clothes, and toothbrushes. It wasn't uncommon for us to decide to take a spontaneous camping trip on a friday afternoon, and be packed and gone in 5 minutes. We'd bounce around to different state parks, explore new areas, and eat out at local restaurants.
Over the last few years, our camping supplies have "grown" quite a bit. Those creature comforts are nice, but they do come at a price that goes well beyond what's printed on the bar code.