As you've figured out, a new tent and sleeping bag will more than do the job of getting you to the weight you want. Just takes $$$$.

You have trees on your property? Practice at home. But you might just want to play it safe and bring the canister. That would get rid of another 2 lbs though.

Water proofing just in case for stream crossings is something to think about. Make sure that no matter what, you have dry stuff to get into after a drenching.