Hi derekeh83, I am a contract worker who spends on average 4 to 5 nights in motels a week. Tips I can share with you are as follows:
Have a meal plan and stick to a grocery list.
For breakfast I keep it simple, have a bowl of cereal and a cup of coffee.
Morning snacks I usually keep some ready to eat yogurt, a packet of berries or almonds on hand.
Lunch consists of a sandwich which the previous nights leftovers or peanut butter for a midday energy boost
An afternoon snack is much the same as a morning snack, I incorporate some citrus fruit with this as well.
For dinner I do the following:
In summer I make a lot of salads to ensure I get my vegetable consumption and maintain a positive nutrition balance along with grilled meat (the Grill idea you have is brilliant)
In winter I either steam vegetables (in a microwave if no cook top is available) along with some grilled meat. You can even grill vegetables on a grill for variety.
The recipes may appear monotonous but with some innovative shopping and a keen eye for new recipes you can keep the meals interesting.