I graft in my house so i can have grafting success almost any month of the year,if i had 1 tip to give it would be dont try to graft too young of seedlings thats were ive had most failure rates when ive tryed to graft too small, i advise tree age of 6 months to 1 year old and at least pencil size of trunk or even a bit larger for better take rates. Lately ive mostly done cleft grafts but had success on side grafts also, i use parafilm and sometimes rubber band on outside of parafilm in case im looking for added presure esp if my cuts are not super straight, im ready for commercail grafting cutting tool as i think this could help me for straighter cuts, also cut scions in straightest part of scions as bends in scions has lower success rate.