As previously stated, you need to wipe those slides down if closed DURING rain. The rubber seals simply will not prevent water from getting on your rugs or furniture as you merrily go on your way. There are no slide topper options that I have been able to find. As far as debris, YES, it CAN/WILL be an issue, especially when camping in areas of PINE trees. At age 72, I HATE getting up on the roof and avoid it anytime I can. No, not afraid of ladders and heights. Afraid of wheelchairs and caregivers!
One of my best friends, age 74, slipped on the roof of his 40 ft motorhome and fell to the ground. He was LUCKY....hospitalized for 2 days and all good.
I am now carrying a taller folding ladder so I can get high enough with my blower to clean debris. I HAVE BEEN and countinue to search for a LONG adjustable broom type device to remove debris while being flat footed on the ground. (if anyone has good experience, please post it.)