I ride a BMW F800GS with Happy Trails Teton side cases and a tank bag. A few weeks ago I took out all my synthetic hammock insulation and WBBB for an overnighter shake down trip. Glad I did too...the synthetic stuff with a Kelty 12X12 left just enough room to add a stove, cook kit, and light food bag. Items that would be really needed for any trip over two days had to be left home.
The first thing I did was get a Shangri La (and Toxaway) tarp to replace the Kelty...it was a sale and HG had no tarps then. Then an Incubator UQ and a regular sized Burrow TQ. The Burrow was a smidge too narrow (don't ask, Mrs. LD loves the Burrow though) and I ordered a custom wider/longer Burrow.
Today I am planning a ride to higher elevations and it is the first time to load the bike with the new kit. In goes the WBBB, Incubator, custom Burrow, and Shangri La with bungie and tree strap kit (and line with CRL justincase). Surprise, there is more than enough room for snack eats and cook kit...even room for a wool sweater/cap, ball cap, and down vest and more! The basic sleep kit modification reduced my load size by about 2/3 from what it was the last time. There will be some added luggage changes but overall this is a perfect two days to one week kit. The tank bag holds a camera (a DSLR that will shrink to a good point & shoot) with various and sundry other need it at hand stuff (like the harmonica).
Very pleased with the quality and comfort of my HG stuff and tonight (Lord willing and the creek don't rise) it will be in the Sierras somewhere getting the snooze test!