Best Trailer Jacks For RV Campers. Great tips and tricks for leveling and stabilizing. DIY options for travel trailers and more. While specifics vary, a jack with 3,500-pound lift capacity is considered standard. How to Matching Your Tow Vehicle To The Trailer. We also go into detail about Manual VS Electric Trailer Jacks. We review our top choice, heavy duty electric, 2000 lb manual, and 5000 lb manual.