Thanks all (well, almost all). It's amazing how quickly you can learn from those who know. Frustrating when search doesn't answer question first but I'm glad there are some off you who remember what it's like to not know everything. Just took a 1.5 hour trip to get the best 15 amp deep cycle charger I could find and I have it running off inverter. I'll probably invest in better technology next year since this is our only 2017 dry trip. The $800 'quiet' inverter is pretty annoying to listen to but luckily my neighbors are a good distance away and we are in heavily forested area, only DW scowels at me.