Having cycle packed my way across many continents over the last 40 years the one thing I have learnt is that if you buy cheap racks, panniers and tent they will sure let you down, at the most inconvenient time and place.
Currently I have choose of two tents, a Vaude Hogan which I use for winter use as it has proven itself to be able to withstand high winds and erects outer first, and I also use a terra nova laser comp which weights just over one Kg, having replaced the pegs supplied with more substantial ones. for summer and short winter touring.
For racks I currently use old man mountain front and rear, and so far not had any problems with them.
For Panniers I use
Altura Orkney 56 Pannier on the rear and Altura Dryline 32 Pannier for use on the front or if I am just using B&B or youth hostel I can use them on the rear
However on hindsight I think I would recommend Ortlieb Back Roller Panniers, as from what I have been told and seen they are truly waterproof.
But for your first adventures, then some of the cheaper tents will do for a few days likewise panniers, however i would recommend that you get good quality racks, as if your rack fails, it can bugger up the trip well good.