Hello James. I have a 2006 Flagstaff and if the lights are like mine the bulbs just pull out and the cover should slide then pull off.. The first time I changed one I thought they were difficult also. Except where I really wanted the light I went to 4 watt bulbs.
Hope this helps.
02 Chevy 2500HD Duramax ,Ally 5 speed, 3.73 gears :Equalizer Hitch
2006 Flagstaff 829FKSS