Wolfman is good kit.

.. Too much for one bag, lap top will be of little use most of time any way. gps you may want a mount for that. Sat pone in a bag someplace else. Lenses ever try to stop the bike pull out a slr swap out lenses and get the shot? Now try it with that fully loaded bike not going to happen. Get a point and shoot for wide and zoom for the slr put the rest in top box.
If you want to shoot out of tank bag only have your camera in it, you will not have time to deal with anything else in it. Side bags are a grate way to deal with the rest of the stuff. If not then a bag in the top box to hold the rest will be fine.
Some thing may want to look in to is what you need to take a fast 50mm a wide like 18mm and something long like 200 or 300 is nice to take. zooms can get around taking to many, like the "Bigma" the sigma 50 to 500 and a 18 to 50 will cover you in almost any shots you need. But take a fast prime there sharp work in low light and focus fast. May want to look in to a tripod as well.


For water I have water bladders and use tie downs and nets over that holds more that I will need. I also have a backpack camelback I use sometime.

Fuel only need to bring it once used a small 1 Gallon can for it used straps and a net for that as well. Do not do to much where I need more than 250 miles the wee can get me. The Wee can get good MPG if you ride slow.