When we visited in April the main refugio was closed for accommodation but at least the bar and restaurant part was open (at times). This is probably the one you've been recommended here. I think that's where most climbers stay and I think they have dorms and so probably isn't so exy.
So anyway we stayed in a Refugio about 50m up the hill from the main Refugio. It would be one of the ones Zugojugo listed but I can't remember which. It was very nice. It was late and we didn't have a lot of options so were happy with this however it was expensive. I'd be guessing, but I think something like 30+ Euro for the two of us. Mind you, after we severely epiced one day - - rapping off one of the highest formations, at night, in gale-force winds (a whole other story - but watch out for the winds) - - we were pretty grateful for somewhere comfy to stay!
Camping near town is not a great option, as far as we could find out. And you'll likely get told off severely if you free camp illegally...