I have a TT membership and I love Yosemite Lakes. Don't expect wifi and cable tv. That's not why you're going. The bathrooms took a hit last winter and they are being renovated. Also, about 50% of the sites in the members only area are not level, also due to a bad winter. But, many of the sites are very large and you don't feel crowded at all. I use my own shower/toilet, I don't use Lodge facilities, and we were there the week before a big holiday so it was very pleasant. The dogs loved the river. We took some great hikes. It's only 5 miles from Yosemite Park entrance and there is a convenient YARTS bus daily, very inexpensive and includes entry fee. However, I didn't go to Yosemite Valley because of my dogs. We had a wonderful time just staying at Yosemite Lakes.
Located about 14 miles outside of Yosemite off of Highway 120 - Yosemite Lakes is a Thousand Trails park which is affiliated with our RPI membership. The park is clean with full hook ups for RVers and tent campers. There are also cabins and yurts available for rentals. Sites are available by the river, under trees or in the sun - if you prefer. The only real complaint was the number of flies that always want to hover around your head. The Country Store is about 1/4 mile away on Hw 120, but their gas is very expensive - about 40 cents more per gallon than in Groveland. However, it has a good variety of items - wine,food, RV accessories, and souvenirs. Note that it closes at 6 pm during the week! This is a family oriented park with a 9-hole mini golf course, badmitten, volleyball, basketball, a swimming hole in the river. NO CELL PHONE SERVICE and in the lodge VEEEEEERY slow wifi!