Hi Rosebud,
I was getting sores similar to that and discovered that my saddle was too narrow (though adequately hard), so I as putting pressure on the inner parts of my pelvis instead of fully on my sit bones. Not sure if that could be a contributing factor for you, but it's possible. There are bike shops that can measure your sit bones on a butt-o-meter, but I did mine at home on a yoga mat. Your saddle should be a couple of cm wider than your sitbone measurement to properly support you. And yes, a little harder is usually better. I have heard the Dolce is pretty squishy. Changing saddles right before a significant tour might be kinda rough too. The harder saddles will take some time for your sitbones to toughen up.
Good luck! There's nothing more miserable than saddle sores. 
Emily
Emily
2011 Jamis Dakar XC "Toto" - Selle Italia Ldy Gel Flow
2007 Trek Pilot 5.0 WSD "Gloria" - Selle Italia Diva Gel Flow
2004 Bike Friday Petite Pocket Crusoe - Selle Italia Diva Gel Flow