Your FunFinder will be 30 amp unless you've modded it with a second A/C unit. My 5er is 50 amp, twin A/C units, but, even when I had my 30 amp FunFinder 210WBS, I would quite often use the 50 amp plug on the pedestal by using a 30 amp to 50 amp adapter.
The reason? Over the years, with the thousands of uses of a 30 amp plug (on the pedestal) and most folks pugging in and disconnecting without turning the circuit breaker off first (on the pedestal), the contacts spark, even when you can't see it, and they don't make as good or clean connection any longer. That can have detrimental effects on your system; everything from causing corrosion (small arcing) on your plug to inadequate amperage carry over from poor contact between your plug and the socket in the pedestal. In many older parks, I would use the 30 to 50 amp adapter and plug into the 50 amp receptacle. Those get less use (not as many of us 50 ampers out there, still) and those of us with 50 amp units are usually a little more conscientious of turning the breaker off. Watch when you plug in, how many times the 30 amp breaker will be in the "ON" position and then look at the 50 amp breaker. Odds are the 50 amp will be "OFF" and the 30 amp will be "ON"...
Always do yourself and the next guy a favor...make sure the breaker is "OFF" when you plug in (for your safety and the equipment's longevity) and make sure you turn it "OFF" before you unplug, again for your safety and the equipment's longevity.
My 2 cents, your mileage may vary...
2 Cats; J-Lo and Ragamuffin :R
2014 Thor Tuscany 40RX DP
2011 Ram 2500 Longhorn CTD HO
2011 Keystone Cougar 318SAB (now gone)
2008 FunFinder X 210WBS (Sadly gone)