First check tire pressure (around 85 psi). Then get an alignment, make sure it has 4.6- 5.2 degrees positive caster. The above cured 90% of my wander. I then added rear track bar, steering stabilizer, air bags and CHF to improving the handling.
2016 Thor Tuscany 34ST XTE, Freightliner XCR, ISB 360hp/800tq. Allison 3000, Koni FSD shocks, Roadmaster 1.75" front sway bar, Safe-T-Plus, DYI air bag flow control valves.
2015 Jeep Willy's Wheeler Wrangler Unlimited Toad, Ready-Brute-Elite tow system.