This is my 2nd stay through Grant (the owner of Arrowhead Retreats) and it was definitely a pleasure. We had a large group going -- Grant was very accommodating, responsive, and helpful in helping us pick out the best locations for our needs. We got pretty much everything worked out over email, which is nice because I could plan a trip for a large group without committing a lot of time to phone calls and unnecessary logistical issues that other property managers tend to cause.
The stays both times were extremely hassle free - keyless entry, very clean and well maintained properties, and always lots to do on and off the property including backyard games/activities and indoor entertainment (speakers, TV, table games, etc.). Your group will not get bored, in fact during both stays, many people in my group chose to spend most of their day relaxing at the house. The house also includes a guide to local hikes, one of which we very much enjoyed (Deep Creek), and a pass to the lake.
Specifically with the Creekside Lodge, we had a big group barbecue on the deck without any issues with the neighbors, which was awesome.
On top of that, each house has plenty of room for a large group, and the Lake Arrowhead area is a nice, peaceful escape from the chaos of LA County.
Highly recommend Grand & Judy Dunning + Arrowhead Retreats! (And no, I was not incentivized to leave this review, I really did have a great experience and offered to write it)