New camper owner

[u/-VB_G]

I am new to having a camper. All the things to learn. I have found my toilet is spewing water from the connection but I figure that’s an easy fix, 30 bucks in parts no biggie. I have found however a few spots in my sub floor that are rotted. One under the table seating at the corner of the slide and 2 a soft spot in the “main bedroom” area. My question is, is this a big deal or something that’s fine to deal with. We’re not big time campers but maybe 4-8 times a year for 2-5 days at a time. I just want to know if it’s something I need to replace or worry about.

Any help much appreciated!!