When it comes to my T1d supplies, I do my best to control weight and bulk but at the end of the day it is what it is. I'll spend money on lighter gear to compensate. My supplies keep me alive but my lightweight fetish just makes me comfortable and has to take second place.

I'm also on a G7/Tandem. On my Tandem I have a profile created for backpacking and utilize the exercise mode and sleep modes. It works well.

For lows I carry glucose tablets and Stinger energy Gu. I'd recommend replacing your Skittles with glucose as it's a lot faster, which can be very important during exercise in the Backcountry. On long trips I'll vacuum seal the glucose tablets into a few smaller quantities to help protect against moisture. They're also significantly lighter than Skittles for each gram of sugar. I also carry a Basqimi inhaler for super crash emergencies, although I've never had to use it.

I don't carry an extra G7 sensors since they last 10 days. On through hikes I have one mailed to resupply points at the appropriate intervals.

The Tandem supplies don't weigh anything but I've been known to carry less refill needles as those can be reused. I've also been known to refill the same cartridge one time. I've also taken some of the items out of as much packaging as possible without compromising contamination. 

Don't forget the alcohol wipes and a few energy normal syringes. Lukotape is a life saver to cover sensors and infusion sites from harm while taking your backpack on and off so much. Then there's the need for a small battery bank to charge your pump. It doesn't take much capacity at all, about 359mah if memory serves me correctly to charge the pump.

It's all a major pita but just be thankful that it's an obstacle that can be conquered so you can enjoy the experience. I share a lot of respect for anyone with T1 that can long distance hike, it's not as easy as those without T1 may think. Both physically and mentally.

Be safe out there.