I have a 12.5' Legend, and yes I can even surf it loaded. I'm not a really good light-weight packer either. Of course it's harder and I can't catch them all, but it's still a blast. It's a damn big little boat. Compare it to our 14' raft, and you'll see it's not as small as it might seem by the specs. I was a little worried about the small size, but he's a big boy!
Sotar's are light, esp compared to the bladder system of Aire. Quite a few Sotar catboaters skip the internal bladder to save weight, but I like the insurance for multi-days.
You will wait much longer to get a Sotar than Aire, since they are custom made.
Bottom chafe is an option, not standard and it adds weight which affects surfing. I drag the crap out of my boat, it is bomber against rocks which is one place that fabric really shines. It is weird, rocks don't seem to bother it, but I've gotten a few wear spots from straps. I recommend a top chafe for this reason so any wear is not on the air chamber.
Goodtimes it looks like your needs are essentially what I was looking at when I bought mine, and it's better loaded than I imagined.