The law differs in other states. Here in Illinois, entry is only barred if the land is posted, " NO Trespassing". Many land owners will give permission for people to enter and walk their property to recover a deer shot elsewhere, while they will not permit hunting on their land. The worst that happens is that someone says no, and if they say that, you get to talk to them to learn why they say no. I have people reverse themselves when they found out I was interested in what their problems were, and why they were upset with people crossing their lands. Usually it relates to people hunting without permission, or breaking fences, or gates, or putting bullet holes in buildings. When they find out that you want to know, and are willing to help them find such people so they can be stopped, that you are willing to take care of their property just to have access to cross it to follow a deer, or hunt on other lands, where you have permission, they will often relent. I have gotten permission to use posted property from land owners by offering to walk the property and just pick up trash blown there, or left their by slobs. I have repaired gates and fences, and have helped farmers do the repairs. They may not hunt, or like to eat wild game, but if given half a chance, they don't mind giving those opportunities to someone who will treat them, and their property with respect.
Seems to me that if you know already where the deer are likely to be in any given year, based on drought or rain conditions, and temperatures during the deer season, you have half of the problem licked. Concentrate on getting permission from the land owners where you think the deer will hold up during the season, rather than with everyone every year.