I don't think it's a good value. But I own a 1976 GMC motorhome and have 3 kids. Our big vacation this year was at a FL State Park 10 minutes from the Panhandle beaches in June. It cost me $24 a night plus tax, plus the grocery bill, which I would have had at home anyway, gas and a $10 week long family pass to the Gulf Shores National Park. It rained one day so we also splurged about $50 on bowling and snacks. Probably a hundred bucks more in oil, grease, and basic mechanical upkeep and repair on a 40 year old motorhome as a direct result of this one trip. We might have gone out to dinner one night as well. We are splurging next year staying in a beach front commercial campground so my parents can rent a cabin next to us. I think the CG is costing $300 for a week, which is probably total what we spent for a week this year.
Our Disney trip last year was 7 nights at Fort Wilderness, 6 day park hoppers, the middle dining plan, no memory maker,
MVMCP tickets (never again), and about $4000 for the five of us all in. I figured it to be a little less than $130 a day per person with gas, but we splurged because the grandparents were going and staying at WL and wanted the DP and party tickets. We are booked again for early 2019 in the campground, no Dining Plan this time, no specialty tickets, no Park Hoppers. It should easily come to less than $100 per person per day even after two annual price increases.
So you can see what we do. We have the luxury of an RV that is paid off and I do most of the work to keep running. We take very cheap vacations for 2 years and save up for a cheap Disney vacation, which is actually a very expensive real vacation.