The advice I give will depend on you having a rental car, but my suggestion is to join skyauction, and bid on a Ready, Set, Go auction to use for a 2 or 3 bdrm condo offsite. We are planning our 3rd stay through skyauction. Each time, we paid a grand total of $262. for a 2 bdrm condo FOR THE ENTIRE WEEK! We stay at a different place each time (but only because the place we stayed the first time, Cypress Point Grand Villas) has become so popular that it doesn't show up on the inventory anymore. Each unit was nicely decorated, well kept, and had full kitchen, 2 bathrooms, and a washer/dryer.
$262 for the entire week, would more than offset the cost of a rental vehicle, and being able to use that vehicle to get groceries for breakfasts/snacks and drinks for the condo, as well as being able to dine at some of the really inexpensive offsite restaurants, it would pay for itself anyway.
I wouldn't be caught dead at a value resort with my family of four, let alone 6! You can't put a pricetag on everybody being getting a good night's sleep, and saving your sanity!