The hidden filter can be a pistol to get to. I would try removing and cleaning the petcock first. IMO it's an easier job. Shutoff the gas , pull the fuel line( you'll need rag here).Attach a piece of hose drain the tank. Remove the petcock, disassemble clean reinstall, go for a ride.
I removed the little hidden filter,tossed it in the trash 20k ago and never looked back. I'm also particular were I buy gas.
I wont stop at some rundown roadside gas stop unless there's no other option.
Mike