2024 Keystone Montana 3791RD vs 2025 Forest River Sandpiper 3220RL

Detailed Comparison

If you're weighing the 2024 Keystone Montana 3791RD against the 2025 Forest River Sandpiper 3220RL, you're looking at two solid contenders. Here's how they stack up.

In terms of footprint, the Keystone Montana 3791RD stretches 40.5 ft while the Forest River Sandpiper 3220RL spans 34.0 ft. Weight-wise, the Keystone Montana 3791RD is the lighter rig at 10,300 lbs versus 11,000 lbs.

The Keystone Montana 3791RD sleeps 10 while the Forest River Sandpiper 3220RL accommodates 4. Slide-outs play a role in livability: the Keystone Montana 3791RD has 1 and the Forest River Sandpiper 3220RL has 3.

For boondocking enthusiasts, tank sizes matter. Fresh water capacity goes to the Keystone Montana 3791RD at 68 gallons versus 58 gallons. Solar-wise, you get 550W on the Keystone Montana 3791RD and 600W on the Forest River Sandpiper 3220RL. Battery banks are 300 Ah and 150 Ah.

At $72,000 MSRP for the Keystone Montana 3791RD and $70,000 for the Forest River Sandpiper 3220RL, the Forest River Sandpiper 3220RL saves you $2,000. With only a 3% price difference, the choice comes down to features rather than cost.

If you're traveling with a family, look for the model with more sleeping positions and better storage. Boondockers: look at the fresh water capacity and solar/battery systems — they determine how long you can stay out. For the full-time RV lifestyle, every gallon of tank capacity and every inch of counter space counts.

Both options have earned their place in the market. Your trip style and budget should be the final tiebreakers.