I needed a trailer as I was tired of rigging and derigging each time. I went to Trailer Source
here in Denver
. They built me a great trailer to my specs that made it work really well for carrying my boay and a ton of gear under the boat. I have a 15' DRE raft which fits great. It tows like a dream. I can back up to the put in, take off the tie downs and shove my boat right in to the water. The price was as good, in the ballpark of the others discussed here. 3500# axle and long enough to place cooler, dry box and oars under the boat. It really rocks.
If interested, send me an e-mail. I will tell you more.