OK, know this was three days ago and you're probably NOT reading this anymore ... but ... I regularly visit another Forum where folks discuss problems using disk imaging and backup products utilizing DVDs -- and the consensus there was that using DVDs for backup, if the number is more than a couple, results in repeated swapping in and out of DVDs during the restore. This results in a restore that would take 15 minutes using a hard drive, taking HOURS using DVDs.
So, if you're still reading this, if you can get your image down to below 30GB, look around for a 32GB USB stick. They're selling for $40 or so nowadays.