I splurged, and bought a Helinox before last year's canoe season.  I like how it folds up, and it's comfortable.  However, I discovered the same thing about the legs digging into soft ground.  I'll try the tennis ball trick. 

I've used Lafuma camp chairs for years, but not sure they're still made. I have three of them, and have had to repair the spot weld at the hinge on all three.  The  fabric is also getting worn, but my seamstress wife can deal with that if/when necessary.   

The Helinox is a bit higher off the ground, and easier to get in and out, than the LaFuma.  However, the LaFuma is a better chair for playing cribbage, another important camp activity!

prouboy