I dont have heaps of gold but... Fractionals are a good way to go IMO. I'm a big fan of the Valcambi 50gm Combibars, which are 50 1gm bars kinda fussed together that you can separate and sell one at a time, and you can buy them at the 50gm premium and sell them with the 1gm premium, which is a lot higher because of size. Also a big fan of the fractional Perth Mint Kangaroos, 1/10oz and 1/4oz are both good sizes. I own a 1/10oz kanga and a 1/25oz Proof, one more for Bullion and the other for more Numismatic/collecter value.
