RI homemade trailer registration question.

[SSX]

I'm heading to the DMV in the morning to attempt to register my homemade utility trailer. All I can gather from the RI DMV website is that I need to bring proof of insurance for the vehicle pulling it, which I have. The trailer is a small single axle utility trailer which I want to use to tow my ATV. It probably weighs around 400 pounds. We built it years ago but never had a use for it until now.

Is there anything I should know, bring or do before going there and waiting for no reason? I've read online that some states require a weight check & safety inspection before registration. However, The RI DMV website says nothing about this. Also, The DMV site says the fee is "$5.00+$1.50 per year" which sounds too cheap/good to be true. If anybody has experience with Rhode Island small home made trailer registration and can lend me some tips to make it a smooth transaction please reply or message me. Thanks.