Before you decide on unwrapped, raise the temperature of your cooker the next time you do ribs. I feel like you were running too low of a temperature cooking them. If you raise it up and cook at 225 or even 275 the whole time you will have a slightly different result. Ou may also try a pork butt at 225 to 275 to try also.. Just so you know, I wrap most things usually but that is mostly for times sake and then have juice for the pulled pork.