I think Yellowstone is cooler, mostly because of all the thermal features.Have you thought about dropping down into the Grand Teton, Jackson area? Might find a spot down there. I've enjoyed Grand Teton as much if not more than Yellowstone.
There are none, but it may be busy with guys hunting the migratory elk out of the park. We raft the upper Yellowstone every year, Carbella is a pretty sweet spot, especially with the upgrades. Just look upstream see where the old Tom Miner Bridge used to beThat’s in a good spot, the website doesn’t mention anything about seasonal closures, but I’ll give them a call whenever they open to double check. Thanks!