[DUCKIE]

As a queuer with 2 years experience... I also concur that it is best to keep it simple... but not too small or too big.

The biggest pain to move carts seemed to be the large motorized ones
(as many were not too hot on the turning thing... or it took them a little while to get it powered up to move... when we needed them to move quickly so they could move down a narrow walkway to the other end of the field before the next match started.)

and the really small/cheep dolly carts... that were like 1' x 1' with the dinky caster wheels. (always a pain to move over cable protectors... and i was not too keen to be putting my hand under a 130 lb. robot that could easily slide off of it... and onto my hand.)

I also recommend that you keep the center of gravity of the robot and cart... somewhat low... at least durring transport... tippy robots/carts = bad!

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If you have the time / want to design and build your own cart...

-think about having the robot supported on the cart by it's chassis and not it's wheels. (that way... it will not roll off the top of the cart (VERY BAD!) and you can also run/test your drive system in the pits without even taking it off the cart.)
-"easy transport / packing" (ours is made of bosch... and itsn't too hard to disassemble/reassemble)
-locking wheels (for those occasional inclines)
-storage/shelving (good to be able to carry at least some basic tools and a tether in case you need to reset quickly)