For most class A's the first mods you should consider are handling imnprovements
SWAY.. the rocking side to side like fans at a rock concert>
Some RV's are good here. Some need help. new sway bars
Wag.. With LEAF SPRING suspension not only can the axle move up and down relative to the body to absorb bumps in the road .. but the body can move side to side a bit.. Now if the front moves right and the back left you THINK you are drifting right so you adjust. then the ends sway and now you THINK drifting left and you adjust.. Actually had you held true you'd be going straight.
TRAC BARS. also called Panhard bars. one front. one rear and this problem is GONE. DEAD. HISTORY. KAPUT. Won't happen. EVER.
Finally steering stablizers. the TWO I suggest are the Blue ox Tru-Center and the Safe-t-Steer with OPTIONAL remote kit.. WHY. The Remote kit.
Beyond that I'd put in a Ham Radio Station. but then I'm a Ham :). (Well more than one way).
Oh. and though not nearly as popular as they were say in the 70/80s.. I'd put in a decent CB as well.. I mean I'm headed south on I-75 comming up on exit 70 something when I hear that about 3 miles down the road are not one but TWO fatal traffic accidents.. Hit right turn signal. Exit. park. Nice restful night.. poor guy behind me was likely thinking "AH He's exiting" when I hit turn signal.... Then he found out why.. Oh well. MY blood pressure was good (his a tad excessive I'm sure). ANd yes. I just missed the backup by about 20 yards.