For those of you considering an aluminum custom boat and wondering what beam width would be the optimum, here is what I know so far. As far as stability in the water, wider is better and you have more room in the cabin and in the aft cockpit for fishing. Alaska State DOT has always required a pilot vehicle on all towed loads exceeding 10 feet per the 1989 Administrative Permit Manual for Oversize and Overweight Permits. The revised 2008 Permits Manual has increased the pilot vehicle requirement to all loads over 10'6", which is good news for boaters. The Whittier Tunnel is also anticipating reducing the toll prices for boat trailers in excess of 10' by next April.
The Chief of Alaska DOT/MSCVE (Commercial Vehicle Enforcement) is Rex Young at 907-365-1210 for further information on the revised Administrative Permit Manual.
On Order: 30' x 10'6" GC with twin Suzuki DF300's
I have been advised by DOT/MSCVE that the revised 2008 Permits Manual changing the requirement for a pilot vehicle for loads over 10' 6" will not be approved and implemented until the spring of next year (April or May). Some of the wording of the manual needs to reworked.