Yeah, that crank is crappy, get one of these, they're cheap as.

wiggle.co.nz | Shimano FC-M590 Deore 9-Speed 48/36/26T Triple Chainset | Chainsets

wiggle.co.nz | Shimano FC-M590 Deore 9-Speed 44/32/22T Triple Chainset | Chainsets

wiggle.co.nz | Shimano XT M770 Hollowtech II Triple Chainset | Chainsets

A hollowtech II BB comes on and off with a $10 tool that can be a torqued up piece of clothing in a pinch. The crank comes off with an allen key and a $2 tool that weighs nothing and could be a bunch of sticks in a pinch.

I can totally see the merit of Square Taper for touring- but only if you're going to get something you definitely won't have to adjust- a better sealed BB (maybe even phil) with a very nice old crank and never have to touch it. ST is not the budget option IMO. Carrying a large adjustable wrench is not viable and not being able to fix your crank could be disastrous in some places.

You don't need to get cables, the DA levers come with them, ends prepped & ferrules installed (thanks shimano!) also a super cool 90s box with marbling effect. Also they're awesome quality, you will be pleased. Get a KMC chain- they're the best- they even make Shimano's chains. Also they have a quick link which makes things easier unlike the Shimano ones.