Get yourself a heavy (12ga) extension cord. You be ok as long as you only operate the A/C. If you are going to continue to run the A/C at home, you may want to consider installing a 30amp RV outlet. You can get everything you need at Lowes for $100.00 or less. If your still uncomfortable installing it yourself, you can hire an electrician.
2015 Jayco 24FBS Elite Jay Flight
2013 Chevrolet Silverado 2500HD 4X4 6.0L 3.73 Axle
HD Trailering Package with Integrated Brake Controller
Equal-i-zer Hitch 10k/1000