I went to the Crown website and if you poke around a little it is clear that they make several lines of batteries and the model you bought is from the Marine line not the Deep Cycle line.
It is a Deep Cycle model in the Marine line but maybe not the most focused designed for that specific application,it is sort of difficult to really see the differences in real world terms.
I know I got a Trojan Deep Cycle GR 31 and crammed it into my Casita
but I have not really tried to see what the endurance is based on your trip requirements.
Each setup is different and all I can suggest is to take a Voltmeter of some kind and watch the Voltage drop as you use the battery.
You also have the option of getting a second matching battery if the 1 is not enough and you will be getting them close enough together in time that they would likely be OK together in Parallel.
Otherwise the Golf Cart volters will certainly give you more current and runtime too if starting from scratch.
If you already have one though just charge it and go see what it does! You can also get a small,cheapish Solar
system like the Harbor Freight model which will likely keep you topped off if used to charged during the day.