Prolonged less than fully charged condition can be a battery killer. About one week is all I would permit. Battery damage from prolonged discharge is much like radiation poisoning -
The more intense (discharge) the faster it damages
The longer the exposure (to undercharge) the more it damages the battery
Your example is a textbook case to choose a solar panel to maintain a more fully charged battery. A fifty-watt panel would be enough for your present load, unless you use your accessories as described day and night.