
For less rugged conditions, the cabins might be a better bet. They sleep 4 with a queen size bed and bunk beds. No bathroom or kitchen or anything, just the next step up in roughing it.
Rancho Oso is a very family-friendly place. It reminded me of tagging along with my friend Katie's family to Lutheran Church camp as kid. They offer family dining on the premises. We didn't utilize that, we brought our own food. And beer/wine/booze. Like most campsites, they requested no alcohol on the premises but the Rancho Oso store carried plenty and when the ranger told us to put out our fire at 10:30 pm, I know he saw the empty wine bottles we had. He didn't say anything. i.e. They turn a blind eye to alcohol. The people that work the ranch are wonderful as long as you're a good guest. They just want you to have a good time.
Other item of note: Really cool restaurant about 10 min. away called Cold Springs Tavern