I have a solution for you but seeing how your factory leveling system spans the entire rear of your 2020 Keystone Passport SL Series Travel Trailer you're not going to be able to go with a hitch. There will be no where to mount one securely enough to support your bike rack and bikes. I recommend the Stromberg Carlson Bike Bunk Trailer-Mounted Bike Rack Carrier for A-Frame Trailers - 2"-100 lbs item # CC-275. This carrier is designed for use with 2" hitch-mounted bike racks that are approved... view full answer...
The etrailer eDream RV Mattress - Innerspring - 75" Long x 60" Wide - Short Queen Item # e94FR will be a great replacement for your Murphy Bed mattress as long its dimensions are 75"L x 60"W. If not please email back with the dimensions and I can recommend the correct fit for your needs. view full answer...
Thanks for reaching out!
It sounds like you have the 1,000 TW/10,000 tow system so you need the L-Pin # FA92-03-9205 for your application.
Attached are review videos of each for you to check out. view full answer...