Glad to have you join iRV2. You Vintage Owners RV group here. Anything over 20 years old can be designated as ...Vintage.
What in the material on the tanks and where are they leaking? There are some people out there that have a "plastic welding" ability. Otherwise you may need to just plan on replacing the tanks.
Amateur Radio Operator (KE5DFR)|Full-Time! - 2012 6.7L Ford Crew Cab Dually -2013 HitchHiker Champagne 38RLRSB - Travel with one Standard Schnauzer and one small Timneh African Gray Parrot