Given you geographic location, if you camp the UP you should be fine but will only have the benefit of one AC. The 15K BTU should do fine. We will spend about 35 days in Oct-Nov in NC, SC, & FL and probably never use the #2 air, but at home here in TX a 2nd AC is a must in just about any trailer. I have the 36CKTS & love it. I've powered it on 30 Amp circuits a couple of times without problems. Remember, don't cut corners, be sure to use a quality adapter. Good luck, if I can provide information on the 36CKTS shoot me a PM.
Mike, Sheila & Toppi our Fur Kid
2013 Cedar Creek 36CKTS/MorRyde IS/Kodiak Disc + bells-n-whistles
2013 Ford F350 Lariat/CC/DRW/Aux Fuel/Curt 20K
from Spring, TX , FROG, CCRVC, CCRVOC & Escapees members