That said, I think it would be edifying to the faithful even if they could hear all of the prayers in Latin and be able to follow. I'm not saying that the prayers can't be said sotto voce (Trent anathemized that sentiment anyways), I'm saying that it may be prudent to not say the prayers sotto voce.
When 8 students from my Newman Club went to a Tridentine Latin Mass in the area, the biggest criticism was that they couldn't hear the prayers. They were fine with kneeling and receiving Communion on the tongue (even in a church that had no altar rails), as well as with the Latin prayers and chant and Latin/English Missals even though it was drastically different from what they were used to. To quote one of my friends: "the prayers were beautiful, if only we could hear them."
I thought I was the only one who remembered that Missal! Yes, it was basically a (good and real) translation of the Tridentine Rite; furthermore, part of the liturgical movement of the 50s and pre-VatII era was an attempt to get priests to say the Mass audibly and correctly.
I wondered how your Tridentine Rite trip turned out, GCC. I know that your kids are not alone, and many people who would be favorably disposed to the content and the poetry of the Old Mass are totally turned off by the fact that you can't hear it, even in Latin. But there are many Tridentine Rite folks who seem to believe that God made the Mass for us not to hear it...I realize that's a parody of their position, but there is definitely a touch of that attitude.
I would love to see a new "Benedictine" Rite, which would take the Tridentine Rite, make a few tiny tweaks, keep some of it in Latin, put some of it in the vernacular, and make it AUDIBLE.
Trent's disciplinary canons are reformable, and Vatican II altered Trent in allowing the vernacular, wheras Trent condemened those who said Mass should be in the vernacular only.