If resistance fighters decide to regroup and resupply after passing the border inside Russia then equipment like large trucks and similar items that are visible from above should be of second priority
as recently there were threats by the ukranian administration to bomb passing vehicles across the Russian border. Some smaller equipment which cannot be immediately transferred accross the border without large trucks like ammunition stockpiles can be buried underground at night or hidden or someway disguised while passing to the other side.
infantry and smaller vehicles should pass with commanders having higher priority to coordinate the resistance from a safer position along with other refugees hiding amongst them. larger weapons like aa trucks can also be evacuated but there should be more caution. Ofcourse If a sector is secure and analyzed to be not too risky passing with arms and better equipment would ensure better protection.
Both Donetsk and Lugansk has a huge border with Russia and other side of the border is protected from above.
If current ukranian administrtion refuses to negotiate and continues the shelling and aerial bombing against minorities then atgms, manpads and ieds can keep them busy for a very long time.