Shouldn't cost you too much to ship it that close. I've shipped several motors thru UPS, had a few shipped to me and no problems yet.
I usually use a rubbermaid tote or a heavy carboard box. Survival depends more on the packaged part inside the container, and the taping of the container, not so much the container itself. I pack the engine in foam all around. I use that soft forming foam with the silver plastic wrapping (it comes in radiator boxes, and whenever we replace radiators at the shop I steal the foam). You can also wrap it up in tons of bubble wrap, or use the white styrofoam that is commonly used in packing appliances and electronics. Take the spark plug out of the motor (it will poke thru the package if you don't) and plug the hole. When taping up the package, be sure to use the fiberglass reinforced strapping tape and wrap it tightly, all the way around, as if it were a band. I have a banding machine and often use plastic bands as well, but the fiberglass tape works well by itself if you use enough.
A wooden crate will work too, but you still have to use tons of packing material to keep it safe. The monkeys that work in the shipping terminals don't care about your motor. They toss and throw stuff all around. The package will get inverted, rolled, laid sideways, and anything else they can do to it. You have to keep this in mind when packaging. And yes, it's true, if the package is easier to lift and handle, it's less likely to get rolled, drug, or slammed.
Sorry to be so long-winded, but if you want it to be safe, do it right! And make sure the package is insured for the full value of what's inside! Good luck!
[FONT="Palatino Linotype"]~My Rides (to name a few) ~
1986 ATC250R, 1985 ATC350X
1985 ATC250R Missile (90% done)
1983 ATC185S
1999 TRX416EX
2003 Honda CBR600RR
1990 Yamaha Zuma
1985 XR80 w/100 motor
1967 Honda CB77, '65 CL77
1962 Puch 250 SGS
1984 XR350R (owned since I was a kid)
1972 Suzuki T350 Rebel, '73 T500 Titan
1964 BSA A65 (needs restored)
1968 BMW R60/2 mint original bike
1976 Kawasaki KH500 triple
Anybody have parts to trade for the above models?