I can't condone that taking opiates with no tolerance in any recreational amount is going to be safe if you are taking benzos (even if you are very tolerant to them). I think the best advice is to just avoid it, but if you do want to proceed, do as much to reduce your benzo intake leading up to it as possible, and also be sure to take none once you've dosed the opiate.
Also, aim for a lower starting dose of the hydrocodone than someone with no opiate tolerance would. Start at 5mg, and that may get you right to where you want to be.