figure 3.5x panel size for daily output?

[skyking]

No tilt, often subject to shading, good camping spots are not ideal for solar. Is 3.5x panel size overly optimistic?

[inetdog]

No tilt, often subject to shading, good camping spots are not ideal for solar. Is 3.5x panel size overly optimistic?

It really depends on your location and the time of year.
You can plug different locations and a fixed array power value into http://pvwatts.nrel.gov/ to get some starting daily/monthly values.

[skyking]

I have done that. Possibly some folks with their own collected data will chime in.
I have a good spot for a 100W panel on my current <pun intended> 5th wheel trailer. The typical usage in the summer is probably near the 18 AH I could collect @ 3.5x 5 amps.