Adjusting steering head bearings is not that bad, an hour or two is all it takes if you're going slowly and carefully. I can have mine done in about 15 minutes or so.
Replacing the wheel bearings is not so bad either, hardest part is dealing with the bearing retainers which require a special tool. That'd take longer, say a weekend if you're learning as you go (assuming you don't have problems with the aforementioned retainers). That said, you shouldn't need to do it all that often, worst case have your mechanic do it and you'll be set for another 3600 miles.
Most of the "regular" maintenance (oil changes, various adjustments, timing, etc) are pretty straightforward and reasonably safe to do, and as other mention above, it's half the fun of riding one of these classic machines.
Pick your mechanic's brain (buy him a beer or something) and he'll likely be quite happy to reel off all sorts of useful information to you.
Downloadable manuals are
HERE and
HERE, I recommend also getting the Honda Common Service Manual and the Honda Carburation Manual in addition to your bike's book.
BTW, on those maintenance schedules posted above, right-click the images and select "View Image" and it will come up in a larger size thats easier to read.
cheers
mystic_1
