Clean, Basic, Cheap, Right on Freeway
Not really our style, since we travel with kids and are looking for things to do (trees, playgrounds, pools, etc.), but for what it is, this is a decently priced, clean, basic RV Park. I didn't get the same creepy feeling of long-timers staring at us when pulling up that I get at other parks, but rather it's nice people (mostly full-time RV retirees) who are here to stay for a week or a month and then move on to the next place.
Location is literally right on the freeway (back wall shares a wall with I-5). Plenty of noise, but not as bad as it could have been.
Compared to other places nearby, the price is great (about$35), and you're right in Vancouver and near Portland. I don't think we'd go back again since it's not our thing, but could be fine if cheap, convenient, and clean is what you're looking for.