We made a reservation for a tent site(no-electric. Management allowed us to switch for a tent site with electric for my c-pap machine. The place is clean and has a picnic table and fire ring. The park was quiet and pleasant.
We were doing a 2-week land/sea cruise from Anchorage, AK, to Vancouver, BC, and didn't want to hassle with a border crossing with our RV (fruits, vegetables, meats, and other items that were not allowed in), so wanted a nice, quiet campground on the US side. We got there a few days before our trip and stayed a few days after, with no problems. Easy access, pull-through site for our 40' coach, crushed rock road and pad, water, cable TV, 50amp, sewer, but no OTA TV and had to go to the office for WiFi. The manager is super-friendly and went out of her way to help us. Very beautiful backdrop of mountains, fields, and dairy farms. Post Office is used to RV general delivery. Must stop is the Adeline Dairy store for some fantastic ice cream! Did a day trip to Mt. Baker to the east. It is berry season, so blueberries and blackberries are plentiful (the campground is surrounded by wild blackberry bushes that were LOADED with ripe, sweet berries that were free to pick!) Down side to the campground is that it is across the street from the railroad - they are constantly building trains from rail cars coming across the border less than a mile to the north, pulling forward, adding cars, backing up, blowing horns at all hours of the day/night. You kind of get used to it after a while. We would definitely stay at the Sumas RV Park again.
Couldn't even be bothered to return our phone calls. Just a full sign as we arrived