All three of the above listed resorts are nice and if you like being twenty fours a day in the casino and shopping area with all those people the Marriott and Tahoe Vacation Club are a great choice.
I rate Ridge Tahoe above both for winter or summer months for different reasons and main one is it is not stuck in with all the casino's.
When we came back to Tahoe to buy again we looked at both of these resorts and decided if we were to be stuck within all this area we would rather do what we have for years and just stay at Harrah's few days or Harveys and get free nights with comps and not worry about the maintance fee's and other charges that go with owning.
Ridge is not only a beautiful resort but being 15 minute drive up the hill gives you the vacation time to relax and enjoy the resort. Also from top of mountain you can take off in any direction to enjoy your day.
We come up every Fourth of July week and spend many hours enjoying the pool area, spa and other options up there. Wife likes to go on the morning hike with the group while I sit on our patio drinking coffee and reading the paper and watching Chip and Dale run around below us!
Now for the Hyatt it is probably the best and we know someone that owns and goes there every winter for skiing. Our problem is we are not winter people,don't ski and we always come up for summer months.
Hyatt is on North Shore away from South Shore about 30 minute drive during summer. Only few clubs on North Shore and Just not that great with two being the old clubs which is fun to go to for few minutes. The Hyatt is alright being very small casino. We drive over every year and have lunch and gamble for a short time and head back to South Shore.
Someone who wants to buy in Lake Tahoe should go there and see what works for them because everyone likes different resort for different reasons!
Remember when you keep seeing one resort for a dollar on e-bay there is a reason that owners have given them up for nothing or most cases paid these companies to take them of their hands!
PHIL