Best Tent Camping near Index, WA

The Red Bridge campground is on the very scenic Mountain loop Rd in the Mount Baker-Snoqualmie National Forest. It's a very beautiful drive. Nestled in some great trees, there are 13 sites with shade, right along the river. The camp host was very nice and sold firewood on site. There are no hook ups, and no water spigots so be sure to plan accordingly. There are bear proof trash cans and vault toilets available. Each site has a tent pad, picnic table and fire ring. This campground provides ample hiking, fishing and I saw people kayaking plus its not far to a hike to some glacier caves! Also check out the old red trestle bridge just outside of the campground. At $15 a night you have to see this place. 
I highly recommend Red Bridge campground.

Cooper Lake is absolutely stunning and admittedly the campsites are situated pretty well for views and privacy but there are definitely Pros and Cons to this campground.

Pros:

Right on the lake and if not you get a very private site walking distance to water
Great hiking trail

Lake access 24/7

Lot's of big shade trees

No internal combustion motors 

Vault toilets in good shape

Dumpsters

Cons: 

Extremely busy (and LOUD) day use area

Steep hill and trails to all the sites - pack light and even then it is A LOT of work getting into your site

$18 for a walk in site...? eh a little steep for me

Did I mention the loud day use area with lots of screaming kids?

No bear boxes by the lake so you also have to trek your cooler/dry goods up the hill every night to not attract wildlife.

All in All this was a solid 3.5 stars.  There were pros to out weight the cons but in the end if I am going to walk that far to haul my stuff into a site I want it to be pretty remote/serene OR be a little cheaper.

This campground is better suited for tents, not RVs or camper vans. Many of the sites are small and lack privacy, especially those in the west end. We reserved on line and there was no notice that sites 30 and 31 share the vehicle space! Since we were camping in a van, we felt like we were in an ordinary parking lot and not camping. Two strange vehicles parked immediately next two us the whole time. There were some other shared parking sites too. Ok for tent camping because you can tent away from the parking area, but not ok for vehicles. 

In addition, people kept walking through our site (and we watched them walk through other occupied sites). One day, my hubby wasn't feeling well, so we took a nap only to be woken by our dog growling because a man and women were peering into the side window of our van! WTH! Numerous people walked through through our site even though the end was a restoration area clearly marked to stay off of, but people walked through it anyway. And, then there were the young men playing football in our site. Oh, and the dogs not on leashes. One knocked me over when it jumped on me from the bushes as I was heading to the restroom at night. 

The only good thing was that the vault toilet was the cleanest ever vault toilet. No odors!! Kudos to the guy who cleans it!

Every dispersed campground we checked along this road (maybe five or so) was littered with human feces and toilet paper everywhere. We found a literal bucket of human waste beside the river with a soiled pool noodle nearby I can only assume was being used as a toilet seat. Please, if you care about keeping nature wild, carry out your toilet paper and dig a cathole or use the outhouse in the campground. If you don’t know what a cathole is, you should probably should not being using dispersed camping and try the campground down the road. We ended up staying at the campground because we couldn’t find dispersed camping where there wasn’t poop and had a positive experience there. Leave no trace!! 

https://www.nps.gov/articles/leave-no-trace-seven-principles.htm

This campground is easy to find but a long drive into the woods on a bumpy gravel road. I made it in a Camery but it was a bumpy ride. Closest store is 45 minutes away so make sure you bring everything you need including firewood. It gets pretty chilly as the campground is well shaded. The river is very loud so you really don't hear your neighbors. The bugs are terrible, I've never seen mosquitos that aggressive. Each site had a tent pad, picnic table, and fire ring. There are some spots closer together but plenty that are set apart enough that you have privacy. Beautiful campground. No cell reception. One group had kids who were older but we didn't see any other kids. Well taken care of vault toilets though there was no host when we were there. Four stars only because the bugs were so bad, everything else about it was perfect for what we were looking for.