I reached out to MORryde and the MORryde Rubber Equalizers for Tandem Axle Trailers - 35" Wheelbase - 8K # MR27ZR you were looking at is designed for 35" axle spacing and would not work with your trailer with 36" axle spacing.
My contact at MORryde did recommend that you double check your axle spacing to see if you do have 35" axle spacing. You will need to measure from the center of the front most leaf spring hanger to the center of the rear most leaf spring hanger as shown in the included... view full answer...
The cover I recommend for your 2020 Heartland Fuel 362 5th wheel toy hauler is the Adco SFS AquaShed RV Cover # 290-52258.
The AquaShed cover is the one best designed to offer protection against all the elements, and even protects your trailer from heavy exposure to the sun and wind. Its top panel beads water so it simply runs off, and will remain a snug fit because it combines cinch ropes and weighted straps to secure to your camper.
The cover also has corners which are elastic so they... view full answer...
Yes, the Roadmaster Comfort Ride system part # RM-2460-2570 would fit your 2019 Fuel 335 Toy Hauler. It would do a great job improving the ride quality. view full answer...