I think it'll do exactly what you're wanting. I do gigs like that with a little 35w combo practice amp with a 10", and it's not even a B102 inside.
Cool, that makes me more confident. I thought about getting a combo, but nothing short of a 2 x 10 or 1 x 15 gigging combo has the wattage to handle the outdoor setting. Showing up to an acoustic strum session with that would be a 60lb buzzkill. It would just be out of place.
Nice thing about going the way I'm going though is that I'll be ultra portable without being painted into that corner. If needed, I can build or buy a 1 x 15 cab and I'm ready to step up to playing with a band.