Using the Level Select cheat is probably the best way to run the collectibles categories until the code monkeys manage to break the game.

I've done this run completely blind with the help of a map and a guide. Unfortunately I won't have the time in the near future to learn navigating through the maps and to route the run.

Here's the guide: https://www.gta-growth.com/gtaa/paquetes_ocultos

Emulator: BizHawk w/ mGBA core & TAS profile