There are only two ways I can think of to tow a 30' trailer and a motorcycle:
1) Fifth wheel toy hauler with a 1-ton diesel pickup.
2) 3/4 or 1-ton pickup, motorcycle in the pickup bed, with a travel trailer.
You could double-tow with a fifth wheel, hitching a small trailer to the RV for the bike, but I think you'd only be legal in some states.
Travel trailers don't have the frame strength to have a motorcycle attached somewhere outside.
Now, if you can take the bike out of the equation, a Suburban 2500 would be a great vehicle for pulling a 30' travel trailer. I have a little bit of experience with that, and I have three teenagers. Plenty of room for them in the back 2 rows. They've logged 20,000+ miles back there.
2008 Suburban 2500 3LT 3.73 4X4 "The Beast"
2013 Springdale 303BHS, 8620 lbs
2009 GMC Sierra 1500 Denali (backup TV, hot rod)
2016 Jeep JKU Sahara in Tank, 3.23 (hers)
2010 Jeep JKU Sahara in Mango Tango PC, 3.73 (his)