Hi
I'm from Romania. Use LEI (now renamed to RON).
Use
http://www.xe.com/ucc/ to convert
Now 1 EUR it's around 3,2 RON
Better, use a credit card for hotels, gas stations, supermarkets, etc. Use LEI on restaurants who don't accept credit cards. Make sure your credit or debit card has a PIN associated, the POS systems always require the PIN code for every transaction.
If you exchange more euros then you can spend here, you can always buy EURO back, go to a bank , there are tons of banks around who have 0% commission and offer a good exchange rate and you are safe.
Feel free to withdraw from ATM's, there are tons of these too. Make sure you double check the ATM insert slot (it isn't very popular to have your card skimmed around, but you never know what could happen).
Other then this, drive safe and watch out for the truck drivers and gypsies when you park your bike.
Good luck