Network to new players [Gmod lua helpme please]

[Stryker]

Hello So basically I have a billboard that shows you some areas and who owns them based off of what someone inputs into a menu, This all works fine and dandy if your on the server at the same time when someone updates the booking areas. However if you join the server post updated you just see Nil until that area is re-updated whilst you are connected.

I would like to know how to network existing strings to new players when they join via
hook.Add( "InitPostEntity", "regconb1load", function()
net.Start("regconb1load")
net.SendToServer()
end)
So basically ^ thats in the cl_init.lua which can be found here - cl_init lua
and I needa make it network with the server to resend the already set network strings. (if thats even how its worded)
via the svbook.lua located here - svbook lua

that is used to open the derma that has all the buttons, all the buttons on the panel do the same thing but with a different output by 1 number as seen in cl_init
here is what happens when you click a button on the derma menu
local BOOKButton1 = vgui.Create( "DButton", BOOKFrame )
BOOKButton1:SetText( "Assign Booking" )                                   
BOOKButton1:SetSize( 120, 50 )
    BOOKButton1:SetFont( "epicfont" )
BOOKButton1:SetPos( 20, 180 )
BOOKButton1.Paint = function(self, w, h)
    draw.RoundedBox( 0, 0, 0, w, h, Color(255, 255, 255, 170))
    end
BOOKButton1.DoClick = function()
  net.Start("regconb1")
net.WriteString(bookregi1) -- Strings and stuffs right here
  net.SendToServer()
end   
if you could help me with this I would really appreciate it.

[The_HAVOK]

util.JSONToTable and util.TableToJSON
if you are writing a relatively large table then you should be compressing it with util.Compress and util.Decompress then the net message as a string.
if the data is REALLY large then you can take a look at the built in gmod duplicator tools scripts to see how to compress, split and send large data over the net library.

[Stryker]

I'm not trying to do this

[DEBUNKED]

-- server
hook.Add("PlayerInitialSpawn", "RegConB1Load", function(ply)
net.Start("regconb1load")
net.WriteString(regconb1)
net.WriteString(regconb2)
-- ...
net.Send(ply)
end)

-- client
net.Receive("regconb1load", function()
regconb1 = net.ReadString()
regconb2 = net.ReadString()
-- ...
end)

[Stryker]

Hey thanks man this worked however when the server first starts up theirs an error
[ERROR] addonlineblahblah/svbook.lua:47: bad argument #1 to 'WriteString' (String Expected, got nil)

is there a way I could determine the string on server start/map change?
I have tried but each of my attempts have broken the joining the server and having what it has been set to this restart so far.