A "30 amp cord" is actually 10 gauge.. I wouldn't use a 100' cord, if you don't need 100'. Buy one, cut it in half, and add a plug and connector, to make you two cords.
A few things to consider - do NOT leave your cords coiled up.. lay them out in large, "S" patterns to take up space. Induction is a real thing..
Using a smaller cord, you're fine initially.. but as current continues, heat builds, resistance goes up, current goes up, then you're voltage will be decreased as load increases. This is what burns up compressors on your AC units..
You don't need 6 awg wire.. that's truly overkill, unless you're pulling power a LONG ways..
A camper AC unit will draw about 12-18 amps when running. But it may draw 25+ to start.. And every time it does, you're slowly melting the blades in a 15 or 20 amp cord.. And they usually burn up when you need the AC the most.. On a Hot Saturday afternoon..
Ignorance and Apathy:
been getting Democrats elected since 1776