Having a little extra length is always nice. (teed that one up) Whether it's 17' or 19', you can put bikes, a weather-proof trunk, etc on it to save space in the motorhome.
If you plan on driving cross-country with this setup, and it sounds like you do, do yourself a gigantic favor and don't pay for an upgrade on tires. Unless these are an option from the dealer, take the wheels and get these, or another comparable commercial rated trailer tire and install them. Trust me, those POS china bombs are a blowout waiting to happen. Even the upgraded ones from the dealers are shit. These HD tires may be overkill, but fixing a flat on a trailer with a Jeep on it on the side of the road sucks donkey balls. And get two spares. If you run over something with tandem wheels, good chance both will go down....
The H-901 ST is a commercial trailer tire designed for agricultural and industrial towing. Learn more today and find them at a dealer near you!
www.herculestire.com