There are no signs of AliExpress and prices on packages. However, sometimes sellers from AliExpress include their business cards in the package. Anyway you can always send a comment with your order asking your seller not to include anything. The sellers on AliExpress have a clear idea about a dropshipping business model and will be happy to assist you.
You can use following sample text (this has already been setup in your store to happen automatically):
‘We are dropshipping! Please don't include an invoice or any promotional materials in the package.’
As for original prices that can appear on the package, we are dropshipping with AliExpress for a couple of years and no one ever complained about the price on the package. Most probably, people don’t even look and are most focused on items inside. Anyway, if there are complaints you could inform them that the price is lowered to avoid paying import taxes.