I guess it really does depend. There is one about 45 miles north of me that's in a larger shopping plaza, so even if it's crowded there's always a space.
There is one that LadyKnight referred to upthread, I think - that I've also been to (well, tried) and the parking situation is absolutely horrendous. Small, somewhat newly built (I think) little shopping plaza and an absolute dearth of available parking spaces. I don't live nearby, but I'm down in that area there quite a bit and have tried twice. Each time there has been literally no spaces.
I'm not patient enough to idle in my car, waiting for a free space. I like TJs, but not enough for that.
Back where I'm from in Ohio, the TJ was freestanding but had plenty of parking.