Nothing wrong with those.
But if you're thinking of a short term or temporary solution there might be better choices. Golf cart batteries are good at charge cycling. They do far better than standard lead acid being deeply drained. They often come in high capacity too.
For a single trip, total amp hours is what you need. For my first long trip I got some cheap Walmart 'deep cycle'. Under $100 each! Granted I abused them and killed them in a season. I did that because like you I wasn't ready to spend big bucks on a long term kit. After that I was ready and just finished a lithium conversion. It's all in knowing your goals!