Whatever you decide, make sure its the BLUE or Yellow Top and not red.
The Red top Optimas are for cars and trucks only. They are starting battereries.
Blue is best for RV house batteries.
Optima Batteries - Home
Be aware though their best battery only has 66 amp hour capacity. Yes you can run them dead without damage; but it will happen more often.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW