OK, so Im going to head out this weekend for a quick overnighter in SoCal. from what i can tell, should only get down to about 50* and I am contemplating trying out a reflectix pad for the first time. Should i bring my selfinflating thermarest (taken that down to 30's) as a backup or you all think the reflectix will do just fine? I am using a Marmot Pinnicle (15*) as a top quilt fwiw. Thanks in advance for the advice!!