I have a regular banquet table, but put it on "bed risers" to make it higher. PERFECT for me. It is very stable and I have had no issues with it. To make a banquet table a custom heighth, (this takes some math here!), use PVC plumbing pipe and insert the legs of a banquet table into them. For me that is about 13 inches each leg...although the length of the leg from the bend to the floor will determine how long to cut your PVC pipes.
Step one: stand at the table with it also standing. determine how many inches higher you would like it to be.
Step two: measuer the leg of the table from the bend to the floor.
Step three: add these two measurements together to determine how long to cut your PVC pipes.
When all four legs are inserted in the PVC pipes, be sure to adjust (or torque?) the legs out for the most stability.
If you want you can then duct tape a piece of fabric around the table and you will have a large amount of storage under the table that is hidden.