Our RV GPS and Waze wanted us to turn on 6th St in Glasgow, which has a 12’ 2” bridge under the railroad tracks. We had seen a review with this warning and seems they have mounted a sign right at the 6th St. turn that warns of the low bridge. We went two blocks further to 4th St. which is the truck route that took us to MT-24 for a 14 mile drive into Ft. Peck Marina. Once we got close, we followed the signs to Fort Peck Marina. We had tried to get reservations at a nearby COE with no luck and found this Campground(CG) via a Google Maps search. We saw the RV Park and pulled into the front of the CG area and took a 200 yard walk down to the tackle shop to check in. The road goes around by the tackle shop and boat ramp and we could have parked down there to check in, but as we are pulling a 40' rig and we couldn't actually see down there we didn't want to risk pulling down the road. Check in was quick. We were not given any kind of CG map or rules sheet. We then proceeded to the CG’s upper level to back-in site 33 with water and 50/30/20 AMP. The CG is essentially a large, well graveled parking lot. There was a ton of room in front of the site, so backing in was a breeze. The electric and water are at the back of the site, so we needed 25 feet of electric cord and water hose to reach the utilities. The site sloped to the driver’s side and we needed to place leveling blocks under that side’s tires. We had no issues with the electric, thankfully, as we were under a heat warning when we were there. Water was okay at about 40 PSI, but had a bad taste, even with our three filter system. There are no trees in the CG, so there was no problem getting a north shot for Starlink. We got 3 bars on Verizon. There’s no Wifi. The sites are long and just wide enough so you can park a boat. Most of the campers here are seasonal and for the most part, they keep their rigs and stuff around the site organized. But, be careful in the vegetated areas as most do not have their dogs on a leash and let them poop where ever. At first, we were wondering how the seasonals are doing their blackwater as the sign as you enter the marina states the nearest dump station is 3.5 miles, which is at Downstream COE CG. The man at the bait shop stated there’s a nice dump station in Glasgow at Scottie's Express Car Wash. He also said there’s a waste truck that will come out to the CG and pump you out, which is what the seasonal guests use. There are no shower facilities here but there is a vaulted restroom near the boat ramp that’s about 150 yards away. We checked out the Downstream COE we had tried to get into and it definiely would have been a better option, but this was our only option at the time.