The cabins are not too rustic in my opinion. We stayed in them when we were a family of 4 and had a great time. You are surrounded by nature where the kids can get out and have fun, you can go for relaxing walks, go fishing, go ride the horses, go to the petting zoo(depending on age of children), experience the campfire and movie every night, enjoy good food....so much more to do.
The 1 bedroom at OKW is larger and has more amenities, extra tv, washer and dryer, huge kitchen if you cook and a bathroom to die for, but FW is still more relaxing as far as I am concerned.
We are OKW-DVC Members and now stay at FW because we have a MH and just prefer staying in our home on wheels.
OKW would always be our first choice but I would give the cabin a shot just to try something different. You could always split your time between the two, say FW first and finish at OKW.
john