My husband I stayed at the Polson KOA (Polson, Mt) one night while we were there visiting a friend and his family. It's convenient if you don't want to spend too much money on a hotel room. The place looked really pretty and the Motorcoach resort attached to it was also pretty and looked very well maintained. You could even sleep in the back of your car (if you have room). We slept in the back of our 2015 Subaru Outback. They have well maintained showers and bathrooms that look like they get cleaned every day. You should wear bathroom slippers or flip flops or something to avoid potential plantar warts in case someone who had it showered there. There's a small gift shop, where you go to check in when you get there. It's kind of like getting a hotel room, except you sleep in your car/tent/camper and walk to the main building for bathrooms/showers. For food, you can drive to town in Polson.

My husband and I camped at Holland Lake Campground in July 2020. The campground host was really friendly and helped us out a lot. There are several trails to go on atv rides and you could get out on the lake too. The host have a kayaks you could rent. There's Holland Lake Lodge too but I think you have to book it way in advance to get a room. We camped in our tent while most other campers there had RVs or campers. It's comfortable as long as it doesn't rain on you. There are bathrooms that are fairly clean for a campground with a sink, soap, and TP. The view of the lake is gorgeous and they do fireworks on the lake over 4th of July. If you need to go for a drive to look for food or anything, there's a Mercantile down the main road a few miles and you can also drive to Seeley (in town). There's a gas station in Seeley with really good hot stuff pizza. Anyway we had a really good time out there. Brought our fourwheeler and rode several trails, had a real camping experience.