You will need a 30amp adapter that should be available from your rental, and I would go w/ this (one or two on your preference).
https://www.harborfreight.com/50-Ft-...ord-62916.html
It works well when I want to plug in at home. As for 20amp you should be fine as long as you don't run A/C and microwave at the same time. This point may be debated however.