I do remember seeing some camper in the park.

Above posts are correct. But if you're asking if u can get to the spring pools the answer is Yes. You can park right in front and there is a ramp down into the water on the outside pool.i would assume the indoor one has a ramp too.

The park is open from 6am to 10pm Mountain time. However, the hot springs that are used for bathing have been closed since the Coronavirus mess started in March 2020 (a fact that is not mentioned on the park's website), and there is no timetable on when those will be reopened.

There is a Strong smell but there are showers in the changing rooms. Even rinsing without soap takes most of the smell away. There isn't an age limit. My youngest are 1 & 2 years old but this isn't a run around whoop it type place. it is for nicely, calmly soaking. My two little one sat on the edge with just their legs in as it was very warm for them. The minerals did not seem to affect our suits. We were in a different hot spring last year in Colorado & they were fine then. You can RENT suits @ the park for the hot springs though.

Yes there were motor homes also parked at the hotels that are very near there.

I don't think that you can make reservations. But the 2 pools are pretty big. They can accommodate quite a number of people. I also don't think that a motor home would fit in the parking lot right in front of the office. It is pretty small. But, there are other parking areas within a block around it. You could call and ask: (307) 864-2176

I rode in/rode out on a motorcycle, so I don't know about the camping reservation aspect of your question, but I can tell you that many of the roads will easily accommodate a 40' Motorhome. That said, DO NOT attempt to drive it on the Iron Mountain Road, or Needles Highway.

Once you get to Thermopolis the hot springs park is on the north side of town. It is a free park to get into and there are various hiking trails throughout the park and a few roads that loop around inside. There are three hot springs pools, one is state run and is free but bathing time is timed. The other two are charge for daily passes and are very nice to relax in both indoor and outdoor pools are available. We have used tepee a couple of times and if you have children it is a fun place for them if no children then the outside pools all five with different temps. are nice to relax in especially when it is cool outside. Just go and enjoy a small park, there is usually buffalo and deers roaming around.