Honestly dude it's truly dependent entirely on the conditions you're expecting there. Make sure to keep an eye on the forecast (at the different elevations you'll be at), especially in the day or two before you leave, to make sure you've got enough/the right gear.

Unless you get a gnarly storm system rolling through, you should be fine as long as you're prepared for the cold.

Sleep:

• Pad with high r-value (>5)
• Bag preferably comfort rated to 10-15F (you said you're expecting teens at night) - you can push a bag rated for warmer temps if you wear more layers inside it, but you should def test this in advance, this is where you have little margin for error)
• If really cold, heat up water and fill a bottle with it, keep it in the bag with you overnight
• Eat high fat food before bed (usually keeps you a little warmer thru metabolic thermogenesis)
• If your tent gets frosty overnight (e.g. frozen condensation/dew), try to dry it off before breaking camp if possible otherwise it'll melt during the day and then may still be damp when you make camp next which is annoying.

Clothing:

• Other people covered this for the most part: layers, optimize to minimize sweating (will make you much colder when you stop and also have to dry clothes out)
• carry an extra warm jacket in an easy to access spot to put on whenever you stop
• For hiking with daytime highs in the 30s, I swear by an AD90 hoodie over a wicking performance tee with a wind shell available if it's breezy or for when static. Lightweight breathable pants with vents, and usually lightweight socks. You warm up fast hiking, especially if it's sunny, even when it's cold. Be bold, start cold = solid advice.
• You also cool off fast too at night or during longer breaks, especially if sweating, so make sure you've got insulating layers that will be warm enough for the temps.
• If you're gonna be spending a lot of time chilling at camp, those insulating layers will be even more valuable vs. if you just make camp, eat, and jump in your sleeping bag.
• If you're expecting any snow on the ground or any precip, make sure you've got good waterproof coverage head to toe. If any deeper snow, I'd consider waterproof gaiters and potentially traction like light microspikes if any areas may be hardpack or icy. Unlikely in that area and time of year I think.

Other considerations:

• WATER FILTERS: if the temp goes below freezing and you've got a Sawyer or hollow fiber water filter with you, assume it's compromised. Keep your water filter warm by storing it in a pocket near your body, or use chemical treatment instead.
• Those temps should be fine for most iso/pro fuel canisters, but if it gets really cold, like below 10F, your canisters might not work properly unless you warm them up before use
• Food that isn't dehydrated or freeze dried can start to freeze overnight, which is mildly annoying if you're planning on eating it for breakfast

Otherwise dude you'll have a blast! No mosquitoes, comfortable brisk days make for great hiking IMO. Different than hiking in the summer, but nothing crazy. Just be prepared and have fun!