I went through this last year.
I was trying to find the perfect thing for multiple uses for a family of four that was cost effective. I called manufacturers, asked friends, scoured the internet for trip reports and gear reviews, poured over catalogs, the whole nine yards.
Spoiler Alert: I Failed
I went with a Big Agnes 3 Forks Shelter with additional side walls. Not dissimilar from 90Duck's REI option. It is free standing, sets up easily, can be used as a shade structure at a festival, rain and sun shelter on the river, as a tent that you can stand up and move around in...
It sucks in the wind (fold over and collapse with bent poles sucks), isn't waterproof, worthless if bugs are a concern, yada, yada, yada.
It got used for a 4 day early season Yellowstone float trip where it rained and was in the 40's, went on the Smith with me, a music festival in July, and the Main Salmon in August.
I tried, I really did. It was a terrible compromise at best. I made modifications, experimented with various guy line methods, different orientations to the prevailing wind, cots and no cots...
By the end of last season, I had determined that the 3 Forks will likely go along for those trips were you have to set up in tight conditions and want some privacy, like at a festival or some other outdoor event, but will otherwise stay packed up in the gear shed. I wanted a do it all shelter that cut down on packed space and set up fast (and it does do that, just not well) because it always seems like my river time is eaten up by set up and tear down while my wife looks after the kids. I am just going to have to grin and bear it until they are a bit older.
The current choice is an MSR Rendevous 200 Tarp with a couple of extra poles. If you've got good sand stakes it can be rigged up pretty bomber, but it is a PITA to set up really well in "challenging" conditions. I almost talked myself into a dragonfly, and still want one
but I needed to be flexible for non-river based adventures.
It's a whole other story, but don't try and go too cheap on your shelter either. I had a Kelty Noah's Tarp literally rip to shreds in steady but reasonable onshore winds while in Big Sur. I also dealt with a couple of gnarly shelter failures when building my cabin.
This has been a multi-year quest.
I'm beginning to think that I am going to simply deal with the sun and only set up a shelter when needed to have a dry place to prepare meals.