Buildings, signs and decorations from Jurassic Park to Jurassic World Campaigns

[Future Doctor]

I just bought the Return to Jurassic Park DLC during summer steam sale. I am disappointed to learn that while buildings like the aviary becomes unlockable in Five Islands campaigns, almost all buildings and all signs and decorations from Jurassic Park are not. (There's even no tabs for signs and no way to research them in vanilla Five Islands campaign)

I know that the aviary is going to be available in Five Islands if I complete the DLC Jurassic Park but what about the rest of the buildings, signs and the decorative 'bathroom' that looks like a shack from Jurassic Park? What do I have to do to make them buildable in the vanilla Five Island save campaign?

Also, vice versa, is it possible to make Vanilla buildings available to build in the DLC Return To Jurassic Park Campaign?

There were two mods in Nexusmods that I think were called ultimate mixed eras something mod that in addition to other things, allows building from both eras but they ONLY work in sandbox.

I know the campaign is moddable. I downloaded 'Isla Sorna Scenery Items' and 'The Standalone Scenery Pack 1' from Nexusmods and put them in Ovidata folder and now, on my vanilla Five Islands save, I can go to scenery tab and place hunter's tent, raptor's nest with eggs, InGen Containers, ect. They're all decorative items but the point is the campaigns can be modded.

[Madest_Max]

Mods
Pretty good and easy solution