I just replaced the wet batteries on my trailer with lithiums. They are coming down in price, I spent a little more for them than the lead acids, two series 24 100 AH 12v. Same brand as Cajun linked you above.
https://www.amazon.com/dp/B0CKR76TNY?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1
Had to cancel last weekends trip otherwise I'd have had a review for you on how they performed.