Please remember that it has been more years than I care to admit since I have been to DLRP, but unless something has changed, I recall the CMs have very peculiar rules about trading pins with them. Whereas at DLR/WDW, where you can trade ANY official Disney trading pin onto a lanyard (provided said pin isn't already there) for ANY pin you want with the CM being unable to refuse, the same isn't (or wasn't) true at DLRP. There, they trade LE for LE, OE for OE and so on and I believe the CMs have (or had) a certain degree of veto power, at least if the trade doesn't follow the rules. I'm uncertain as to how LR pins are treated as they weren't being produced when I was there, or at least not in quantity and I didn't attempt to trade for any.
Oh, and have fun if you end up going!