hey mate, there are no stupid questions, if you dont ask you wont get. there are 2 schools of thought on that, one is disconnect and make your way up the 5th line keeping your feet clear and not wrapping any lines around your hand make your way slowly to the kite, personally i would only try this on light wind days
the other thought is stay hooked into your safety do same as above but if the kite takes off it will only go so far, this is the much safer option just remeber to walk beside your lines on the windward side. if you lose grip on the kite you dont want any lines around your feet or fingers. the key here is to not rush, take your time and itll be fine!!

in regards to tangles once you have secured your kite run your bar away from the kite the full length and it should pull the lines all back into place with no tangles. the second method is by far the safest for others on the beach, hope this helps.