Great discussion and wonderful to get the collective wisdom from everyone.
I've been using a tarp and bivy for while and like it, but during a 12-13 hour rain storm at the base camp below Mt. Whitney, I really was envious of a friend's MLD Duomid because he was able to sit up, cook, and generally had more room to move around.
I was going nuts laying on my side, back, and stomach under my tarp for all those hours. I could have pitched the tarp higher, but it did illustrate the short comings of a tarp in heavy, prolonged rain.
Since then, I have been considering a MLD Solomid for really heavy and prolonged rains, but wanted to know if people would recommend a polycro ground sheet or use the bivy?
Just curious as a ground sheet would be a lot lighter than my 13 oz MLD eVent bivy, which I love, but would seem unnecessary in a Mid.
As always, thanks for your thoughts and advice.