A light aircraft pilot will land his/her plane at 30% above stall speed plus the wind speed. The lessen for model fliers is: fly comfortablyl above stall and perhaps a bit more when it's windy. The extra speed mitigates the effects of gusts when it's windy. If you're flying in gusty conditions, and you fly your approach near stall, you'll have some trouble as post 4 states.

If the slipping has you knackered then you can simply crab, and straighten out at the last moment. The plane flies the approach with the nose pointed into the wind a bit, but otherwise travels straight down the runway. You may have to control the amount the plane is pointing into the wind to maintain your straight-down-the-centerline direction. You enter the slip during the flare, to get yourself straightened out for touch down. Add some rudder to straight out, and enough opposite aileron to counter the rudder input and remain level if the plane begins to roll. Flying a low wing plane, with a long wing span (e.g. scale glider), you may have no choice but to crab in because your won't have ground clearance to bank the wings in a slip.