Removing the silicone is not arduous. The whole trailer can be dealt with in an afternoon (most of that watching caulk soften). You'll have to decide if you want to do it yourself or have it done by someone else. Some of this RV stuff is better to DIY but I know some folks can't/won't do it.
FYI, silicone is a pretty good sealant between two surfaces in compression. That is why RTV silicone is used between engine heads and valve covers, oil pan covers and engine blocks, water pumps and engine blocks, etc.. Silicone caulk breaks down pretty fast from UV and weather, usually within a couple of years, IME.