I have been using both red and yellow top optima batteries for years with great success. I have a yellow top that was used for several years in our old camper, moved it to our new camper and used it for one season. It has been sitting unused in the basement for almost a year now. I do not keep a charger on it, I have just been checking it now and then whenever I think of it (usually 3 months or so) and it has never dropped below 12.5v I charge it up and forget it until next time.
Sams club stopped carrying them and now has Duracell agm batteries, so that is what I use now, in both regular and deep cycle, and have been very happy with them. Our tow vehicle, a Yukon XL, has a regular(not deep cycle) Duracell agm and it holds its charge just as well as the optima through the winter months (vehicle is not driven in winter).
I used to have to clean battery terminals every year on both the camper and our other vehicles, sometimes replacing the cable terminals due to corrosion. Since switching to agm's I have only cleaned the terminals once- during installation. No more rotted battery trays or acid eaten wiring harness either. I don't think I will ever go back to a wet cell battery.
