Speaking of COE CG's, closer to home you have Thomson Causeway Recreation area right on the Mississippi, there are a number of sites that back up to the river. Not quite the mountains or the ocean but scenic nonetheless (and a lot quicker to get to!)...
We love the area around Lake Itasca/Bemidji - camped at both parks many times when our kids were at Concordia Language Village outside of Bemidji. The headwaters is an outstanding place to visit, you'll get a special kick being from STL to be able to...
Another vote for Lake Farm Park, clean, well-maintained, nice bathroom/shower building, easy access into town. We have a group that goes there every year in June.
Online & site specific. We're pretty much always at State/National/County parks or COE campgrounds that are set up for online. They always send an email confirmation so you can have a printed record of what you signed up for. A lot will have fairly g...