If you hadn't said Maine or someplace similiar, I'd have asked about the change of clothes. Silk skivvies are warmer, lighter and pack MUCH smaller than cotton- worth looking into. And remember, if you are wearing the same kind of briefs as "Heff" it can't be all THAT bad. *grins*

A change clothes is great for morale, and critical in place where it actually can be raining at 25 degrees. For that reason, rain pants? Goretex gaiters?

I also like seeing a change of clothes in a pre-loaded BOB. Grab and go sometimes means you are going out the door with pretty town clothes on rather than rugged items. Do you have boots in your car?

How medium duty is your rope? Can you get better and easier to handle in that bulk? Stronger?

I'd consolidate the towels into a single washcloth and your bandannas. Crystal lite is good, remember to wait for any purification tablets to their thing first.

What kind of tarp? Big blues are good but heavy. The mylar/woven nylon casualty blankets are just as strong and bulky, and unlike space blankets, actually keep you warm. Tyvek packs up to a fraction the bulk and weight, you can buy it on eBay or scrounge it from construction sites. (It comes on BIG rolls, 7 or 9 feet wide, and for a lot of construction sites, 8, 10 feet of it isn't enough to save but it works great for hikers and survivalists, so don't make a midnight requisition.)

At some point, upgrade the trowel to a U-Digit. Heavy, but much stronger. If you have to dig a fire or cat hole in rocky soil, any plastic trowel will die.

I saw you like the Seirra cup for sentimental reasons. OK, I can deal with that. Otherwise, I'd have suggested the cups that go over a Nalgene bottle, just because the work better in some ways and take up functionally zero space.

I don't like to have less than 4L of water available to me. I never know how far I'll have to go to get more, and it might not be safe for any number of reasons. At the very least, I might add an "unbottle" bladder, to use as just a water carrier.

Lightsticks have thier role, but Krills and Glo-toobs are more efficient. The Glo-toob does take a funny battery, but they last for a couple days on it, so when I can do so, I'm going to switch my Krill (which retired my old candle lantern) and glowsticks in for those.

Did I miss a stove? Even if it is just Esbit, the ability to make something hot to drink without having to gather wood can be wonderful, and a proper camp stove while bulky and expensive can be very convenient.

Water tablets are good, and a good filter is even better. At the very least update the former, you won't always want to start a fire to boil water if you need to bug out.

Hammock? They pack tiny, are versatile, and keep you off the ground when it is raining.

Now for my BIG question- what kind of pack are you using? That is mostly out of curiosity than anything else. EDIT: Never mind, I missed it in your post

And welcome aboard, from what I see in that list, you'll fit in well.