I ended up getting the Optima 8052-161 (group 31). I've been really happy with it. It's more expensive, but a 4-day trip doesn't even put a dent in the battery power and I haven't been "power thrifty" at all.
1975 American Clipper RV with Dodge 360 (photo in profile)
1998 American Clipper Fold n Roll Folding Trailer
Both born in Morgan Hill, CA to Irv Perch (Daddy of the Aristocrat trailers)