If you have decent electro-mechanical skills, you might also look at building your own battery using Prismatic, pouch, etc., cells with a BMS. This route also gives you a little more packaging flexibility too. This is the route I went a few years ago for our all electric 15A project (7500Wh battery).
You can find lightly used cells on eBay at a good discount or new here:
https://www.electriccarpartscompany....ncased-Battery
And here for cells and/or BMS:
https://overkillsolar.com/shop/
If you camp well into the shoulder sun months and/or low sun angle winter months be sure to factor this calculation into the battery capacity size you will need...assuming you're not plugged into the grid...ditto solar