Well,,,that depends a lot on weather your shooting off the shelf or off a rest.
If your shooting off the shelf,at this stage of your game your pretty much going to need feathers,,,,and the geting wet affecting your arrow flight is well over played anyway.
I just don't worry about shooting wet feathers,because my bow/arrow tune is well up to it at the ranges I hunt at,,between 0 and 30 odd yards.
If your shooting off a rest,plastic vanes will shoot as well as feathers,are often more quite in flight,and cost less.
I guess the cost of feathers in your case ain't going to be an issue though.
I shoot both off the shelf and with a rest,so I use both when it suits me.
I have shot vanes off the shelf and with cock vane in I get good shelf/strike plate clearance,but it's not something I would recommend to new archers,simply because it adds complications they don't need during that part of the learning curve.
Basicly, you can do anything you like with real feathers as their very forgiving.
Good luck.