While the sims help a lot they are not an exact replication of R/C flying. If you are not able to add in gusting and/or changing conditions I stand behind my original statement. Start with winds below 10 kts (yes about 12 MPH or 18 KPH) and you should do well. You want to have feedback from your inputs and not the winds. At altitudes below 2000' AGL wind is affected by objects on the ground ie: buildings, trees, hills...etc. This causes turbulence, wind shear, and gusting. Therefore our models are always affected by wind, IN ALL PHASES OF FLIGHT, equally.