My 2 cents

You are getting very personalized advise. There is no standard packing list for touring. Everybodys needs, wants, and abilities are different.
If you want to take something like a laptop, you have to ask yourself, is the benefit worth the sacrifice? If it is, then take it. I take cotton
t-shirts when I tour. Yes they take a long time to dry, but when they are dry they sure are comfy. Besides, that's what laundromats are for.
When I toured cross-country, I also had a pair of jeans because I did a lot of sight-seeing. My rig weighed 105lbs and I had no problem cranking out 60-80mi days.(and thats with almost no training, and me living in flat south Florida and starting my trip in Seattle).

My advise to you... Take everything that you think you will need or really want. You could always discard stuff as you travel, or ship it home.
Wouldn't you rather send your laptop home than leave without it and then realize that you could have easily brought it along?

p.s. I use a small roll of black electrical tape instead of duct-tape. It's more compact, very strong and waterproof.
3 or 4 zip-ties might come in handy.