Transferring from site to site w/o fees?

Sorry if this question has been answered before, tried a search and couldn't find the answer.

I deposited $100 into Party last week, and now with winnings and cleared bounus I have $200. I would like to move 1/2 to doyles room and 1/2 to UB, both will give 100% bonus. But how can I get it over to them without paying fees? Neteller advertises that there is no fee to send money to a merchant, but fail to mention the 8.9% fee they charge for putting the money into the account. That would be $18+ in fees I would rather not pay. Maybe I misunderstand netellers fee structure, but I have read as much as I can find on their site.

Can somebody with direct experience give me some advice? I mean, part of bankroll management has to be minimizing the leaks involved with moving the money from site to site.