Be carefull mixing alchohol, benzo's and opiates, as they are all CNS depressants. Combining them greatly increases the risk for an overdose.
As for first time dosing with oxycodone and benzo's:
Oxy-10mg should get a naive user rather stoned, don't go above 30mg unless you want to be puking your guts out.
Benzo's-It really depends what you're bringing. If it's xanax, .5mg should get a naive user feeling nice and mellow, taking more than that will just increase the likeliness of a particularly nasty black out. It should also be said that benzo's do not produce a noticable "buzz" in the sense that alchohol, opiates, psychadellics and stimulants do. They basically do what they're meant to do, ease anxiety. Taking extrodinarily huge dosages because you dont feel "high" has led to many,
many bad decisions, not to mention, in a black out it would be easy to forget simle HR information like "dont mix these with alchohol or oxycodone/other opiates".
Clonazepam is equipotent more or less to xanax (though it has a longer duration, and the onset takes longer.
Lorazepam is sort of in between clonazepam and xanax, though it is half as potent (1mg lorazepam/ativan = .5mg clonazepam/alprazolam)
Valium(diazepam) is a lot weaker mg per mg than alprazolam and clonazepam. 10mg of valium equals roughly .5mg of clonazepam. It also has a long duration.
That being said, we are not here to tell you what drugs would be fun to do on a vacation. This is a harm reduction forum. If you want to check out
The Drug Culture forum, you might find some information regarding nice combinations, especially in
this thread. Just make sure to research the interactions between all the different drugs you plan on doing.