i will try to answer these but i am only a beginner on sss really,
1) The only tables i know where this would be the case would be deep tables or full stack tables so just choose the normal tables for sss play
2) I would bet around 2/3-3/4 pot, don't slow play or check as they could have a low pair and get 2 pair or set etc
3) It depends what the pair on the board is but i would more than likely still play it in the same way, if the pair was low cards like say 2-6 then considering your 4BB+1 per limper raise pre flop your opponent ideally shouldn't be carrying these cards although it happens, but if say the board was 7qq and you were holding kk then the q could easily be in your opponents hand range, if this is the case i would still conti bet then depending on my opponents reaction decide on what to do on the turn
i hope this helps and please correct me if i am wrong as this could also improve my play