Honestly, if youre gonna be out in the cold at Acadia, skip the wireless stuff. Batteries die way faster when its freezing, and losing connection in the middle of a 5-minute exposure is the worst. I've used the Vello ShutterBoss II Remote Switch with Digital Timer for Nikon with DC2 Connection for years on my D750 and it never fails. Its way sturdier than the basic Nikon one and the cord actually has some decent length to it. Heres what I recommend based on what works in the field:

• Vello ShutterBoss II Remote Switch with Digital Timer for Nikon
• My go-to. Its around 50 bucks, does intervals/long exposures, and has a backlit screen which is huge for night shots.
• JJC LCD Timer Remote Shutter Release for Nikon DC2
• Basically a cheaper clone of the Vello. Usually under 25 dollars. A bit more plastic-y but works fine if youre on a budget. Just bring extra AAA batteries. Even wired ones need juice for the LCD screen. Hope the trip goes well, those Maine skies are worth the effort.

Ive spent a lot of nights out in the cold trying to get star trails to work without the camera shaking. When I first started with my D750, I actually tried using the internal interval timer, but its a total pain to set up in the dark and it doesnt really give you that tactile lock for a long bulb exposure. I eventually picked up the PHOTTIX TR-90 Digital Timer Remote for Nikon DC2 after my first cheap Amazon one literally snapped at the connector. Its pretty basic but the build quality feels way better than the generic unbranded ones you see everywhere. The thing about these wired remotes is they are basically just a circuit closer. You want something where the cable isnt gonna get stiff and brittle when the temp drops. Ive had cables get so frozen they wouldnt bend, and thats how they break. If you really want to try wireless but are scared of the connection, check out the Hahnel Captur Remote Control and Power Hub for Nikon. It uses 2.4GHz which is way more reliable than those old infrared ones. Honestly tho, for a trip like Acadia where you might only get one clear night, I always carry a super simple Nikon MC-DC2 Remote Release Cord as a backup. Its tiny and weighs nothing. It doesnt have a timer, but you just slide the lock up and use a stopwatch on your phone. Sometimes simple is better when its 2am and your fingers are numb. Just make sure you have some gaffer tape to secure the cord to your tripod leg so it isnt dangling and catching the wind... it prevents that micro-shake you get from the cable moving in the breeze.

Building on the earlier suggestion, I have to agree that going wired is basically the only safe bet for a place like Acadia. Unfortunately, many photographers get burned by wireless signals dropping out right when the temperature hits freezing. It's super disappointing that most of the hardware available now feels like cheap plastic thatll snap in your hand... its a real shame. One thing to watch out for tho is the port tension. On the D750, those accessory ports are kind of finicky. If the cable is just dangling, the wind can pull it enough to break the connection mid-exposure. Always wrap the cord around the tripod head once just to act as a strain relief. You could use the built-in interval timer as a backup, but it lacks the flexibility of a physical lock for bulb mode. Skipping the strain relief usually ends in a failed session when youre exhausted.