Need truck advice

3rd Gen(02-09)Dodge trucks are extremely notorious for bed rust in particular. My 06 only has only 131k miles but at about 100k to 110k I started to notice bubbling under the paint. Over that winter it turned into rust in several 4-5" spots through the paint around both wheel wells. Sanded, did Por15 as best I could, and threw on some fender flares. My 2nd Gen only has 84k but it was a Michigan truck so the entire bottom side, running gear etc was full of rust. My bed, doors, and rockers all look better than my 3rd Gen.