Spiro, I think that depends on what most appeals to you. I suggest that you check out the website and read up on each "resort". Obviously, you've got plenty of time. But if you wind up having your heart set on one particular place, make sure you book early.

Sylvan Lake is charming but far from
the other parts of the park.
Legion is for me has the best situation : you have not too miles to drive to be at the wild life loop or to drive needles highway.
We were there 2 yeras ago with our daughters.A 2 rooms cabin : 2 rooms, a great kitchen/dining room/living room and a bathroom, near the lake : that was perfect.
The lodge has a nice small restaurant perfect for breakfast and diners : the trout was delicious.
Erik

spirobulldog
Just make sure whatever one you take has AC. We stayed at the Game Lodge,( in the main lodge) and the room was not air conditioned, we had to ask to be moved to one of their motel rooms, it was not charming, but it was cool. It is just too hot in the summer to stay in a room with no AC.

I'm not an ecologist extremist, but
I think that if you travel to a national park like Custer, or Yellowstone or Yosemite or Glacier, ie not in the desert, it would be fine not to add to the warming on earth...
Just to open 2 windows in the room, to take close what can avoid the sun in the day and it's nice...
Same thing for the car : try to drive in those places with window open...(I'm not speaking/Utah, Arizona,...).
If everyone try to do some effort ,then perhaps in 50 years our small children will be able to see glaciers in Glacier national park...
Try to find some pictures 40 years ago/Grinnel Glacier and pictures from now and it's a drama...
So, hike more than drive. If you drive, windows open more than A/C and in motel/hotel, more window open or fans than A/C and this will be fine for the future...
Last year in a ranch, some hosts have asked , after a day hike, when we came back to the ranch, to be deposed at the door of their room more than at the lodge-150 yards for one, 200 for the others...Can you imagine that?...
Erik.

First of all Custer is a State Park.

It can get hot in the Black Hills. We have seen it well over 100° during the day and even in the 90's after nighfall. Those kind of nights don't make for happy campers. Doesn't matter if you are in a tent or a non A/C motel room. We spent the night in Buffalo to the north of the Hills one year and it was 100° at midnight.

Custer could be a state park, a national park, a national monument,
I continue to think it worth to do some efforts to preserve those marvels of nature.
Erik

Definitely worth it IMO but I'm biased because I grew up in that part of the world.

In the Summer, in the Black Hills....can it get hot..Oh yes and you'll want A/C if you can get it.

Erik, granted Custer could qualify as a National Park but SD has every right to be proud of their Custer State Park. We have camped and visited there many many times over the years. To us its second only to Yellowstone. In fact we plan on visiting both once again later this summer.

Dukey-
Yeah, but that river water sure is cold!!!! I spent two summers in a tent in the black hills ages ago, and I'll never forget how cold that river was to bathe in!


I also caught my first fish there. One kernel of corn and voila! a big fresh-water rainbow trout. Yuummee! (think: fish farm)

I know Custer could be more than a state park, but I don't know the "legal" way to such improvment...
We've been in SD 2 and 3 years ago, 2 weeks at each time and we'll find it marvellous.
My remark was too point out that whatever was Custer-state or national park or national monument- everybody have to do some effort to preserve
nature and that our tendance to want the best "comfort" is a little egoist.
Erik

Well call me egoistic, I want heat in winter and AC in the summer.

and call me Monpetit, it's my last name.
Erik